| December\u00a031, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Balance, at beginning of year | $ | 564\u00a0 | $ | 2,138\u00a0 | $ | 2,378\u00a0 | |||||||||||
| Net charges to expenses | 425\u00a0 | 217\u00a0 | 711\u00a0 | ||||||||||||||
| Write-offs, net of recoveries | (527) | (1,791) | (951) | ||||||||||||||
| Balance, at end of year | $ | 462\u00a0 | $ | 564\u00a0 | $ | 2,138\u00a0 |
| December\u00a031, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Balance, at beginning of year | $ | 564\u00a0 | $ | 2,138\u00a0 | $ | 2,378\u00a0 | |||||||||||
| Net charges to expenses | 425\u00a0 | 217\u00a0 | 711\u00a0 | ||||||||||||||
| Write-offs, net of recoveries | (527) | (1,791) | (951) | ||||||||||||||
| Balance, at end of year | $ | 462\u00a0 | $ | 564\u00a0 | $ | 2,138\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| Primary geographical markets: | |||||||||||
| U.S. | $ | 637,879\u00a0 | $ | 523,577\u00a0 | |||||||
| International | 136,546\u00a0 | 100,756\u00a0 | |||||||||
| Total | $ | 774,425\u00a0 | $ | 624,333\u00a0 | |||||||
| Timing of revenue recognition: | |||||||||||
| Products delivered at a point in time | $ | 728,254\u00a0 | $ | 584,556\u00a0 | |||||||
| Products and services delivered over time | 46,171\u00a0 | 39,777\u00a0 | |||||||||
| Total | $ | 774,425\u00a0 | $ | 624,333\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Receivables | $ | 182,165\u00a0 | $ | 145,413\u00a0 | |||||||
| Short-term contract assets (Prepaid expenses and other assets) | 17,879\u00a0 | 15,055\u00a0 | |||||||||
| Long-term contract assets (Other assets) | 51,986\u00a0 | 42,087\u00a0 | |||||||||
| Short-term contract liabilities (Deferred revenues) | 47,665\u00a0 | 81,783\u00a0 | |||||||||
| Long-term contract liabilities (Deferred revenues) | 125,473\u00a0 | 100,204\u00a0 | |||||||||
| Contract Assets | |||||
| Balance on December 31, 2019 | $ | 57,142\u00a0 | |||
| Amount recognized | (17,652) | ||||
| Increase | 30,375\u00a0 | ||||
| Balance as of December 31, 2020 | $ | 69,865\u00a0 |
| Contract Liabilities | |||||
| Balance on December 31, 2019 | $ | 181,987\u00a0 | |||
| Revenue recognized | (87,555) | ||||
| Increase due to billings | 78,706\u00a0 | ||||
| Balance as of December 31, 2020 | $ | 173,138\u00a0 | |||
| December 31, 2020 | |||||
| (In thousands) | |||||
| Fiscal year: | |||||
| 2021 | $ | 47,665\u00a0 | |||
| 2022 | 38,402\u00a0 | ||||
| 2023 | 32,569\u00a0 | ||||
| 2024 | 27,311\u00a0 | ||||
| 2025 | 20,291\u00a0 | ||||
| Thereafter | 6,900\u00a0 | ||||
| Total | $ | 173,138\u00a0 | |||
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| Primary geographical markets: | |||||||||||
| U.S. | $ | 637,879\u00a0 | $ | 523,577\u00a0 | |||||||
| International | 136,546\u00a0 | 100,756\u00a0 | |||||||||
| Total | $ | 774,425\u00a0 | $ | 624,333\u00a0 | |||||||
| Timing of revenue recognition: | |||||||||||
| Products delivered at a point in time | $ | 728,254\u00a0 | $ | 584,556\u00a0 | |||||||
| Products and services delivered over time | 46,171\u00a0 | 39,777\u00a0 | |||||||||
| Total | $ | 774,425\u00a0 | $ | 624,333\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Receivables | $ | 182,165\u00a0 | $ | 145,413\u00a0 | |||||||
| Short-term contract assets (Prepaid expenses and other assets) | 17,879\u00a0 | 15,055\u00a0 | |||||||||
| Long-term contract assets (Other assets) | 51,986\u00a0 | 42,087\u00a0 | |||||||||
| Short-term contract liabilities (Deferred revenues) | 47,665\u00a0 | 81,783\u00a0 | |||||||||
| Long-term contract liabilities (Deferred revenues) | 125,473\u00a0 | 100,204\u00a0 | |||||||||
| Contract Assets | |||||
| Balance on December 31, 2019 | $ | 57,142\u00a0 | |||
| Amount recognized | (17,652) | ||||
| Increase | 30,375\u00a0 | ||||
| Balance as of December 31, 2020 | $ | 69,865\u00a0 |
| Contract Liabilities | |||||
| Balance on December 31, 2019 | $ | 181,987\u00a0 | |||
| Revenue recognized | (87,555) | ||||
| Increase due to billings | 78,706\u00a0 | ||||
| Balance as of December 31, 2020 | $ | 173,138\u00a0 | |||
| December 31, 2020 | |||||
| (In thousands) | |||||
| Fiscal year: | |||||
| 2021 | $ | 47,665\u00a0 | |||
| 2022 | 38,402\u00a0 | ||||
| 2023 | 32,569\u00a0 | ||||
| 2024 | 27,311\u00a0 | ||||
| 2025 | 20,291\u00a0 | ||||
| Thereafter | 6,900\u00a0 | ||||
| Total | $ | 173,138\u00a0 | |||
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Raw materials | $ | 10,140\u00a0 | $ | 4,197\u00a0 | |||||||
| Finished goods | 31,624\u00a0 | 27,859\u00a0 | |||||||||
| Total inventory | $ | 41,764\u00a0 | $ | 32,056\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Raw materials | $ | 10,140\u00a0 | $ | 4,197\u00a0 | |||||||
| Finished goods | 31,624\u00a0 | 27,859\u00a0 | |||||||||
| Total inventory | $ | 41,764\u00a0 | $ | 32,056\u00a0 |
| Estimated\u00a0Useful Life | December 31, | ||||||||||||||||
| 2020 | 2019 | ||||||||||||||||
| (Years) | (In thousands) | ||||||||||||||||
| Equipment and machinery | 3-10 | $ | 63,411\u00a0 | $ | 48,114\u00a0 | ||||||||||||
| Furniture and fixtures | 5-10 | 2,532\u00a0 | 2,404\u00a0 | ||||||||||||||
| Computer equipment | 3-5 | 2,972\u00a0 | 1,698\u00a0 | ||||||||||||||
| Capitalized software costs | 3-5 | 17,004\u00a0 | 11,656\u00a0 | ||||||||||||||
| Leasehold improvements | 3-10 | 9,021\u00a0 | 8,713\u00a0 | ||||||||||||||
| Construction in process | 9,747\u00a0 | 8,446\u00a0 | |||||||||||||||
| Total | 104,687\u00a0 | 81,031\u00a0 | |||||||||||||||
| Less accumulated depreciation and amortization | (61,702) | (52,095) | |||||||||||||||
| Property and equipment, net | $ | 42,985\u00a0 | $ | 28,936\u00a0 |
| Estimated\u00a0Useful Life | December 31, | ||||||||||||||||
| 2020 | 2019 | ||||||||||||||||
| (Years) | (In thousands) | ||||||||||||||||
| Equipment and machinery | 3-10 | $ | 63,411\u00a0 | $ | 48,114\u00a0 | ||||||||||||
| Furniture and fixtures | 5-10 | 2,532\u00a0 | 2,404\u00a0 | ||||||||||||||
| Computer equipment | 3-5 | 2,972\u00a0 | 1,698\u00a0 | ||||||||||||||
| Capitalized software costs | 3-5 | 17,004\u00a0 | 11,656\u00a0 | ||||||||||||||
| Leasehold improvements | 3-10 | 9,021\u00a0 | 8,713\u00a0 | ||||||||||||||
| Construction in process | 9,747\u00a0 | 8,446\u00a0 | |||||||||||||||
| Total | 104,687\u00a0 | 81,031\u00a0 | |||||||||||||||
| Less accumulated depreciation and amortization | (61,702) | (52,095) | |||||||||||||||
| Property and equipment, net | $ | 42,985\u00a0 | $ | 28,936\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||||||||||||||||||||||||||||||||
| Gross | Additions | Accumulated Amortization | Net | Gross | Accumulated Amortization | Net | |||||||||||||||||||||||||||||||||||
| (In thousands) | |||||||||||||||||||||||||||||||||||||||||
| Goodwill | $ | 24,783\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | 24,783\u00a0 | $ | 24,783\u00a0 | $ | \u2014\u00a0 | $ | 24,783\u00a0 | |||||||||||||||||||||||||||
Intangible assets: | |||||||||||||||||||||||||||||||||||||||||
| Other indefinite-lived intangibles | 286\u00a0 | \u2014\u00a0 | \u2014\u00a0 | 286\u00a0 | 286\u00a0 | \u2014\u00a0 | 286\u00a0 | ||||||||||||||||||||||||||||||||||
| Intangible assets with finite lives: | |||||||||||||||||||||||||||||||||||||||||
| Developed technology | 13,100\u00a0 | \u2014\u00a0 | (5,276) | 7,824\u00a0 | 13,100\u00a0 | (3,093) | 10,007\u00a0 | ||||||||||||||||||||||||||||||||||
| Customer relationships | 23,100\u00a0 | 3,321\u00a0 | (5,723) | 20,698\u00a0 | 23,100\u00a0 | (2,814) | 20,286\u00a0 | ||||||||||||||||||||||||||||||||||
| Total purchased intangible assets | $ | 36,486\u00a0 | $ | 3,321\u00a0 | $ | (10,999) | $ | 28,808\u00a0 | $ | 36,486\u00a0 | $ | (5,907) | $ | 30,579\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
Developed technology, and patents and licensed technology | $ | 2,183\u00a0 | $ | 2,184\u00a0 | |||||||
Customer relationships | 2,909\u00a0 | 2,543\u00a0 | |||||||||
Total amortization expense | $ | 5,092\u00a0 | $ | 4,727\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||||||||||||||||||||||||||||||||
| Gross | Additions | Accumulated Amortization | Net | Gross | Accumulated Amortization | Net | |||||||||||||||||||||||||||||||||||
| (In thousands) | |||||||||||||||||||||||||||||||||||||||||
| Goodwill | $ | 24,783\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | 24,783\u00a0 | $ | 24,783\u00a0 | $ | \u2014\u00a0 | $ | 24,783\u00a0 | |||||||||||||||||||||||||||
Intangible assets: | |||||||||||||||||||||||||||||||||||||||||
| Other indefinite-lived intangibles | 286\u00a0 | \u2014\u00a0 | \u2014\u00a0 | 286\u00a0 | 286\u00a0 | \u2014\u00a0 | 286\u00a0 | ||||||||||||||||||||||||||||||||||
| Intangible assets with finite lives: | |||||||||||||||||||||||||||||||||||||||||
| Developed technology | 13,100\u00a0 | \u2014\u00a0 | (5,276) | 7,824\u00a0 | 13,100\u00a0 | (3,093) | 10,007\u00a0 | ||||||||||||||||||||||||||||||||||
| Customer relationships | 23,100\u00a0 | 3,321\u00a0 | (5,723) | 20,698\u00a0 | 23,100\u00a0 | (2,814) | 20,286\u00a0 | ||||||||||||||||||||||||||||||||||
| Total purchased intangible assets | $ | 36,486\u00a0 | $ | 3,321\u00a0 | $ | (10,999) | $ | 28,808\u00a0 | $ | 36,486\u00a0 | $ | (5,907) | $ | 30,579\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
Developed technology, and patents and licensed technology | $ | 2,183\u00a0 | $ | 2,184\u00a0 | |||||||
Customer relationships | 2,909\u00a0 | 2,543\u00a0 | |||||||||
Total amortization expense | $ | 5,092\u00a0 | $ | 4,727\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Salaries, commissions, incentive compensation and benefits | $ | 6,634\u00a0 | $ | 5,524\u00a0 | |||||||
| Customer rebates and sales incentives | 36,622\u00a0 | 24,198\u00a0 | |||||||||
| Freight | 10,300\u00a0 | 4,908\u00a0 | |||||||||
| Operating lease liabilities, current | 4,542\u00a0 | 3,170\u00a0 | |||||||||
| Liability due to supply agreements | 5,500\u00a0 | 1,729\u00a0 | |||||||||
| Other | 12,944\u00a0 | 7,563\u00a0 | |||||||||
| Total accrued liabilities | $ | 76,542\u00a0 | $ | 47,092\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Salaries, commissions, incentive compensation and benefits | $ | 6,634\u00a0 | $ | 5,524\u00a0 | |||||||
| Customer rebates and sales incentives | 36,622\u00a0 | 24,198\u00a0 | |||||||||
| Freight | 10,300\u00a0 | 4,908\u00a0 | |||||||||
| Operating lease liabilities, current | 4,542\u00a0 | 3,170\u00a0 | |||||||||
| Liability due to supply agreements | 5,500\u00a0 | 1,729\u00a0 | |||||||||
| Other | 12,944\u00a0 | 7,563\u00a0 | |||||||||
| Total accrued liabilities | $ | 76,542\u00a0 | $ | 47,092\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Warranty obligations, beginning of period | $ | 37,098\u00a0 | $ | 31,294\u00a0 | $ | 29,816\u00a0 | |||||||||||
| Accruals for warranties issued during period | 7,021\u00a0 | 5,244\u00a0 | 3,040\u00a0 | ||||||||||||||
| Changes in estimates | 9,954\u00a0 | 8,591\u00a0 | 6,515\u00a0 | ||||||||||||||
| Settlements | (12,811) | (10,881) | (8,579) | ||||||||||||||
| Increase due to accretion expense | 3,255\u00a0 | 2,326\u00a0 | 1,989\u00a0 | ||||||||||||||
| Other | 1,396\u00a0 | 524\u00a0 | (1,487) | ||||||||||||||
| Warranty obligations, end of period | 45,913\u00a0 | 37,098\u00a0 | 31,294\u00a0 | ||||||||||||||
| Less: current portion | (11,260) | (10,078) | (8,083) | ||||||||||||||
| Noncurrent | $ | 34,653\u00a0 | $ | 27,020\u00a0 | $ | 23,211\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Warranty obligations, beginning of period | $ | 37,098\u00a0 | $ | 31,294\u00a0 | $ | 29,816\u00a0 | |||||||||||
| Accruals for warranties issued during period | 7,021\u00a0 | 5,244\u00a0 | 3,040\u00a0 | ||||||||||||||
| Changes in estimates | 9,954\u00a0 | 8,591\u00a0 | 6,515\u00a0 | ||||||||||||||
| Settlements | (12,811) | (10,881) | (8,579) | ||||||||||||||
| Increase due to accretion expense | 3,255\u00a0 | 2,326\u00a0 | 1,989\u00a0 | ||||||||||||||
| Other | 1,396\u00a0 | 524\u00a0 | (1,487) | ||||||||||||||
| Warranty obligations, end of period | 45,913\u00a0 | 37,098\u00a0 | 31,294\u00a0 | ||||||||||||||
| Less: current portion | (11,260) | (10,078) | (8,083) | ||||||||||||||
| Noncurrent | $ | 34,653\u00a0 | $ | 27,020\u00a0 | $ | 23,211\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Level 3 | Level 3 | ||||||||||
| Liabilities: | |||||||||||
| Warranty obligations | |||||||||||
| Current | $ | 8,267\u00a0 | $ | 6,794\u00a0 | |||||||
| Non-current | 20,469\u00a0 | 13,012\u00a0 | |||||||||
| Total warranty obligations measured at fair value | 28,736\u00a0 | 19,806\u00a0 | |||||||||
| Total liabilities measured at fair value | $ | 28,736\u00a0 | $ | 19,806\u00a0 | |||||||
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Balance at beginning of period | $ | 19,806\u00a0 | $ | 11,757\u00a0 | $ | 9,791\u00a0 | |||||||||||
| Accruals for warranties issued during period | 7,021\u00a0 | 5,244\u00a0 | 3,040\u00a0 | ||||||||||||||
| Changes in estimates | 5,039\u00a0 | 6,167\u00a0 | 2,455\u00a0 | ||||||||||||||
| Settlements | (7,781) | (6,212) | (4,030) | ||||||||||||||
| Increase due to accretion expense | 3,255\u00a0 | 2,326\u00a0 | 1,989\u00a0 | ||||||||||||||
| Other | 1,396\u00a0 | 524\u00a0 | (1,488) | ||||||||||||||
| Balance at end of period | $ | 28,736\u00a0 | $ | 19,806\u00a0 | $ | 11,757\u00a0 |
Percent Used (Weighted Average) | ||||||||||||||||||||||||||
| Item Measured at Fair Value | Valuation Technique | Description of Significant Unobservable Input | December 31, 2020 | December 31, 2019 | ||||||||||||||||||||||
| Warranty obligations for microinverters sold since January 1, 2014 | Discounted cash flows | Profit element and risk premium | 15% | 14% | ||||||||||||||||||||||
| Credit-adjusted risk-free rate | 13% | 16% | ||||||||||||||||||||||||
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Level 3 | Level 3 | ||||||||||
| Liabilities: | |||||||||||
| Warranty obligations | |||||||||||
| Current | $ | 8,267\u00a0 | $ | 6,794\u00a0 | |||||||
| Non-current | 20,469\u00a0 | 13,012\u00a0 | |||||||||
| Total warranty obligations measured at fair value | 28,736\u00a0 | 19,806\u00a0 | |||||||||
| Total liabilities measured at fair value | $ | 28,736\u00a0 | $ | 19,806\u00a0 | |||||||
| Convertible notes hedge | Warrants liability | ||||||||||
(In thousands) | |||||||||||
| Fair value as of March 9, 2020 | $ | 89,056\u00a0 | $ | 71,552\u00a0 | |||||||
| Change in the fair value | 28,052\u00a0 | 24,799\u00a0 | |||||||||
| Fair value as of May 20, 2020 | $ | 117,108\u00a0 | $ | 96,351\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Balance at beginning of period | $ | 19,806\u00a0 | $ | 11,757\u00a0 | $ | 9,791\u00a0 | |||||||||||
| Accruals for warranties issued during period | 7,021\u00a0 | 5,244\u00a0 | 3,040\u00a0 | ||||||||||||||
| Changes in estimates | 5,039\u00a0 | 6,167\u00a0 | 2,455\u00a0 | ||||||||||||||
| Settlements | (7,781) | (6,212) | (4,030) | ||||||||||||||
| Increase due to accretion expense | 3,255\u00a0 | 2,326\u00a0 | 1,989\u00a0 | ||||||||||||||
| Other | 1,396\u00a0 | 524\u00a0 | (1,488) | ||||||||||||||
| Balance at end of period | $ | 28,736\u00a0 | $ | 19,806\u00a0 | $ | 11,757\u00a0 |
Percent Used (Weighted Average) | ||||||||||||||||||||||||||
| Item Measured at Fair Value | Valuation Technique | Description of Significant Unobservable Input | December 31, 2020 | December 31, 2019 | ||||||||||||||||||||||
| Warranty obligations for microinverters sold since January 1, 2014 | Discounted cash flows | Profit element and risk premium | 15% | 14% | ||||||||||||||||||||||
| Credit-adjusted risk-free rate | 13% | 16% | ||||||||||||||||||||||||
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Redundancy and employee severance and benefit arrangements | $ | \u2014\u00a0 | $ | 1,575\u00a0 | $ | 2,228\u00a0 | |||||||||||
| Asset impairments | \u2014\u00a0 | 1,124\u00a0 | 1,601\u00a0 | ||||||||||||||
| Consultants engaged in restructuring activities | \u2014\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Lease loss reserves (benefit) | \u2014\u00a0 | (100) | 300\u00a0 | ||||||||||||||
| Total restructuring charges | $ | \u2014\u00a0 | $ | 2,599\u00a0 | $ | 4,129\u00a0 |
| Redundancy and Employee Severance and Benefits | Lease Loss Reserves and Contractual Obligations | Total | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Balance as of December 31, 2018 | $ | 904\u00a0 | $ | 288\u00a0 | $ | 1,192\u00a0 | |||||||||||
| Charges | 2,699\u00a0 | \u2014\u00a0 | 2,699\u00a0 | ||||||||||||||
| Cash payments | (1,610) | \u2014\u00a0 | (1,610) | ||||||||||||||
| Non-cash settlement and other | (1,993) | (288) | (2,281) | ||||||||||||||
| Balance as of December 31, 2019 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | |||||||||||
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Redundancy and employee severance and benefit arrangements | $ | \u2014\u00a0 | $ | 1,575\u00a0 | $ | 2,228\u00a0 | |||||||||||
| Asset impairments | \u2014\u00a0 | 1,124\u00a0 | 1,636\u00a0 | ||||||||||||||
| Lease loss reserves (benefit) | \u2014\u00a0 | (100) | 340\u00a0 | ||||||||||||||
| Total restructuring charges | $ | \u2014\u00a0 | $ | 2,599\u00a0 | $ | 4,204\u00a0 |
| Employee Severance and Benefits | Asset Impairments | Lease Loss Reserves and Contractual Obligations | Total | ||||||||||||||||||||
| (In thousands) | |||||||||||||||||||||||
| Balance as of December 31, 2018 | \u2014\u00a0 | \u2014\u00a0 | $ | 1,591\u00a0 | 1,591\u00a0 | ||||||||||||||||||
Other (1) | \u2014\u00a0 | \u2014\u00a0 | (1,591) | (1,591) | |||||||||||||||||||
| Balance as of December 31, 2019 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Redundancy and employee severance and benefit arrangements | $ | \u2014\u00a0 | $ | 1,575\u00a0 | $ | 2,228\u00a0 | |||||||||||
| Asset impairments | \u2014\u00a0 | 1,124\u00a0 | 1,601\u00a0 | ||||||||||||||
| Consultants engaged in restructuring activities | \u2014\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Lease loss reserves (benefit) | \u2014\u00a0 | (100) | 300\u00a0 | ||||||||||||||
| Total restructuring charges | $ | \u2014\u00a0 | $ | 2,599\u00a0 | $ | 4,129\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Redundancy and employee severance and benefit arrangements | $ | \u2014\u00a0 | $ | 1,575\u00a0 | $ | 2,228\u00a0 | |||||||||||
| Asset impairments | \u2014\u00a0 | 1,124\u00a0 | 1,636\u00a0 | ||||||||||||||
| Lease loss reserves (benefit) | \u2014\u00a0 | (100) | 340\u00a0 | ||||||||||||||
| Total restructuring charges | $ | \u2014\u00a0 | $ | 2,599\u00a0 | $ | 4,204\u00a0 |
| Redundancy and Employee Severance and Benefits | Lease Loss Reserves and Contractual Obligations | Total | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Balance as of December 31, 2018 | $ | 904\u00a0 | $ | 288\u00a0 | $ | 1,192\u00a0 | |||||||||||
| Charges | 2,699\u00a0 | \u2014\u00a0 | 2,699\u00a0 | ||||||||||||||
| Cash payments | (1,610) | \u2014\u00a0 | (1,610) | ||||||||||||||
| Non-cash settlement and other | (1,993) | (288) | (2,281) | ||||||||||||||
| Balance as of December 31, 2019 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | |||||||||||
| Employee Severance and Benefits | Asset Impairments | Lease Loss Reserves and Contractual Obligations | Total | ||||||||||||||||||||
| (In thousands) | |||||||||||||||||||||||
| Balance as of December 31, 2018 | \u2014\u00a0 | \u2014\u00a0 | $ | 1,591\u00a0 | 1,591\u00a0 | ||||||||||||||||||
Other (1) | \u2014\u00a0 | \u2014\u00a0 | (1,591) | (1,591) | |||||||||||||||||||
| Balance as of December 31, 2019 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Convertible notes | |||||||||||
| Notes due 2025 | $ | 320,000\u00a0 | $ | \u2014\u00a0 | |||||||
| Less: unamortized discount and issuance costs | (64,979) | \u2014\u00a0 | |||||||||
| Carrying amount of Notes due 2025 | 255,021\u00a0 | \u2014\u00a0 | |||||||||
| Notes due 2024 | 88,140\u00a0 | 132,000\u00a0 | |||||||||
| Less: unamortized discount and issuance costs | (19,119) | (35,815) | |||||||||
| Carrying amount of Notes due 2024 | 69,021\u00a0 | 96,185\u00a0 | |||||||||
| Notes due 2023 | 5,000\u00a0 | 5,000\u00a0 | |||||||||
| Less: unamortized issuance costs | (102) | (143) | |||||||||
| Carrying amount of Notes due 2023 | 4,898\u00a0 | 4,857\u00a0 | |||||||||
| Sale of long-term financing receivable recorded as debt | 1,925\u00a0 | 4,501\u00a0 | |||||||||
| Total carrying amount of debt | 330,865\u00a0 | 105,543\u00a0 | |||||||||
| Less: current portion of convertible notes and long-term financing receivable recorded as debt | (325,967) | (2,884) | |||||||||
| Long-term debt | $ | 4,898\u00a0 | $ | 102,659\u00a0 |
| Convertible note embedded derivative liability | |||||
| Fair value as of March 9, 2020 | $ | 68,700\u00a0 | |||
| Change in the fair value | 47,600\u00a0 | ||||
| Fair value as of May 20, 2020 | $ | 116,300\u00a0 |
| Year Ended December 31, 2020 | |||||
| Contractual interest expense | $ | 649\u00a0 | |||
| Amortization of debt discount | 10,072\u00a0 | ||||
| Amortization of debt issuance costs | 1,229\u00a0 | ||||
| Total interest cost recognized | $ | 11,950\u00a0 |
| Convertible notes hedge | Warrants liability | ||||||||||
(In thousands) | |||||||||||
| Fair value as of March 9, 2020 | $ | 89,056\u00a0 | $ | 71,552\u00a0 | |||||||
| Change in the fair value | 28,052\u00a0 | 24,799\u00a0 | |||||||||
| Fair value as of May 20, 2020 | $ | 117,108\u00a0 | $ | 96,351\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| Contractual interest expense | $ | 1,284\u00a0 | $ | 759\u00a0 | |||||||
| Amortization of debt discount | 6,325\u00a0 | 3,492\u00a0 | |||||||||
| Amortization of debt issuance costs | 646\u00a0 | 375\u00a0 | |||||||||
| Total interest cost recognized | $ | 8,255\u00a0 | $ | 4,626\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| Contractual interest expense | $ | 200\u00a0 | $ | 1,226\u00a0 | |||||||
| Amortization of debt issuance costs | 40\u00a0 | 245\u00a0 | |||||||||
| Total interest costs recognized | $ | 240\u00a0 | $ | 1,471\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
| Convertible notes | |||||||||||
| Notes due 2025 | $ | 320,000\u00a0 | $ | \u2014\u00a0 | |||||||
| Less: unamortized discount and issuance costs | (64,979) | \u2014\u00a0 | |||||||||
| Carrying amount of Notes due 2025 | 255,021\u00a0 | \u2014\u00a0 | |||||||||
| Notes due 2024 | 88,140\u00a0 | 132,000\u00a0 | |||||||||
| Less: unamortized discount and issuance costs | (19,119) | (35,815) | |||||||||
| Carrying amount of Notes due 2024 | 69,021\u00a0 | 96,185\u00a0 | |||||||||
| Notes due 2023 | 5,000\u00a0 | 5,000\u00a0 | |||||||||
| Less: unamortized issuance costs | (102) | (143) | |||||||||
| Carrying amount of Notes due 2023 | 4,898\u00a0 | 4,857\u00a0 | |||||||||
| Sale of long-term financing receivable recorded as debt | 1,925\u00a0 | 4,501\u00a0 | |||||||||
| Total carrying amount of debt | 330,865\u00a0 | 105,543\u00a0 | |||||||||
| Less: current portion of convertible notes and long-term financing receivable recorded as debt | (325,967) | (2,884) | |||||||||
| Long-term debt | $ | 4,898\u00a0 | $ | 102,659\u00a0 |
| Year Ended December 31, 2020 | |||||
| Contractual interest expense | $ | 649\u00a0 | |||
| Amortization of debt discount | 10,072\u00a0 | ||||
| Amortization of debt issuance costs | 1,229\u00a0 | ||||
| Total interest cost recognized | $ | 11,950\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| Contractual interest expense | $ | 1,284\u00a0 | $ | 759\u00a0 | |||||||
| Amortization of debt discount | 6,325\u00a0 | 3,492\u00a0 | |||||||||
| Amortization of debt issuance costs | 646\u00a0 | 375\u00a0 | |||||||||
| Total interest cost recognized | $ | 8,255\u00a0 | $ | 4,626\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| Contractual interest expense | $ | 200\u00a0 | $ | 1,226\u00a0 | |||||||
| Amortization of debt issuance costs | 40\u00a0 | 245\u00a0 | |||||||||
| Total interest costs recognized | $ | 240\u00a0 | $ | 1,471\u00a0 |
| Convertible note embedded derivative liability | |||||
| Fair value as of March 9, 2020 | $ | 68,700\u00a0 | |||
| Change in the fair value | 47,600\u00a0 | ||||
| Fair value as of May 20, 2020 | $ | 116,300\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
(In thousands) | |||||||||||
| Operating lease costs | $ | 5,332\u00a0 | $ | 4,041\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
Operating lease liabilities, current (Accrued liabilities) | $ | 4,542\u00a0 | $ | 3,170\u00a0 | |||||||
| 15,209\u00a0 | 9,542\u00a0 | ||||||||||
Total operating lease liabilities | $ | 19,751\u00a0 | $ | 12,712\u00a0 | |||||||
Supplemental lease information: | |||||||||||
Weighted average remaining lease term | 6.4 years | 5.5 years | |||||||||
Weighted average discount rate | 7.7% | 8.6% |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
Cash paid for amounts included in the measurement of lease liabilities: | |||||||||||
Operating cash flows from operating leases | $ | 4,762\u00a0 | $ | 3,636\u00a0 | |||||||
Non-cash investing activities: | |||||||||||
Lease liabilities arising from obtaining right-of-use assets | $ | 10,625\u00a0 | $ | 4,834\u00a0 |
| Lease Amounts | |||||
| (In thousands) | |||||
Year: | |||||
| 2021 | $ | 5,830\u00a0 | |||
| 2022 | 4,677\u00a0 | ||||
| 2023 | 4,056\u00a0 | ||||
| 2024 | 3,069\u00a0 | ||||
| 2025 | 2,275\u00a0 | ||||
| 2026 and thereafter | 3,968\u00a0 | ||||
Total lease payments | 23,875\u00a0 | ||||
Less: imputed lease interest | (4,124) | ||||
Total lease liabilities | $ | 19,751\u00a0 |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
(In thousands) | |||||||||||
| Operating lease costs | $ | 5,332\u00a0 | $ | 4,041\u00a0 |
| December 31, 2020 | December 31, 2019 | ||||||||||
| (In thousands) | |||||||||||
Operating lease liabilities, current (Accrued liabilities) | $ | 4,542\u00a0 | $ | 3,170\u00a0 | |||||||
| 15,209\u00a0 | 9,542\u00a0 | ||||||||||
Total operating lease liabilities | $ | 19,751\u00a0 | $ | 12,712\u00a0 | |||||||
Supplemental lease information: | |||||||||||
Weighted average remaining lease term | 6.4 years | 5.5 years | |||||||||
Weighted average discount rate | 7.7% | 8.6% |
| Years Ended December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
Cash paid for amounts included in the measurement of lease liabilities: | |||||||||||
Operating cash flows from operating leases | $ | 4,762\u00a0 | $ | 3,636\u00a0 | |||||||
Non-cash investing activities: | |||||||||||
Lease liabilities arising from obtaining right-of-use assets | $ | 10,625\u00a0 | $ | 4,834\u00a0 |
| Lease Amounts | |||||
| (In thousands) | |||||
Year: | |||||
| 2021 | $ | 5,830\u00a0 | |||
| 2022 | 4,677\u00a0 | ||||
| 2023 | 4,056\u00a0 | ||||
| 2024 | 3,069\u00a0 | ||||
| 2025 | 2,275\u00a0 | ||||
| 2026 and thereafter | 3,968\u00a0 | ||||
Total lease payments | 23,875\u00a0 | ||||
Less: imputed lease interest | (4,124) | ||||
Total lease liabilities | $ | 19,751\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| Weighted average grant date fair value | $ | 38.45 | $ | 9.16 | $ | 2.83 | |||||||||||
| Expected term (in years) | 3.8 | 3.8 | 4.0 | ||||||||||||||
| Expected volatility | 86.4% | 89.1% | 88.5% | ||||||||||||||
| Annual risk-free rate of return | 0.1% | 2.1% | 2.6% | ||||||||||||||
| Dividend yield | \u2014% | \u2014% | \u2014% |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Cost of revenues | $ | 3,759\u00a0 | $ | 1,650\u00a0 | $ | 1,071\u00a0 | |||||||||||
| Research and development | 12,701\u00a0 | 4,897\u00a0 | 2,940\u00a0 | ||||||||||||||
| Sales and marketing | 11,548\u00a0 | 5,678\u00a0 | 3,074\u00a0 | ||||||||||||||
| General and administrative | 14,495\u00a0 | 7,216\u00a0 | 4,347\u00a0 | ||||||||||||||
| Restructuring | \u2014\u00a0 | 735\u00a0 | \u2014\u00a0 | ||||||||||||||
| Total | $ | 42,503\u00a0 | $ | 20,176\u00a0 | $ | 11,432\u00a0 | |||||||||||
| Income tax benefit included in the provision for incomes taxes | $ | 61,389\u00a0 | $ | 8,185\u00a0 | $ | \u2014\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Stock options, RSUs, and PSUs | $ | 39,841\u00a0 | $ | 19,216\u00a0 | $ | 10,691\u00a0 | |||||||||||
| Employee stock purchase plan | 2,662\u00a0 | 960\u00a0 | 741\u00a0 | ||||||||||||||
| Total | $ | 42,503\u00a0 | $ | 20,176\u00a0 | $ | 11,432\u00a0 |
| Number of Shares Outstanding | Weighted- Average Exercise\u00a0Price per Share | Weighted- Average Remaining Contractual Term | Aggregate Intrinsic Value (1) | ||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | |||||||||||||||||||||
| Outstanding at December 31, 2017 | 8,426\u00a0 | $ | 1.77\u00a0 | ||||||||||||||||||||
| Granted | 213\u00a0 | 4.43\u00a0 | |||||||||||||||||||||
| Exercised | (1,346) | 1.75\u00a0 | $ | 5,096\u00a0 | |||||||||||||||||||
| Canceled | (521) | 2.94\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2018 | 6,772\u00a0 | $ | 1.76\u00a0 | ||||||||||||||||||||
| Granted | 43\u00a0 | 14.58\u00a0 | |||||||||||||||||||||
| Exercised | (2,616) | 1.22\u00a0 | $ | 31,093\u00a0 | |||||||||||||||||||
| Canceled | (102) | 4.07\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2019 | 4,097\u00a0 | $ | 2.18\u00a0 | ||||||||||||||||||||
| Granted | 11\u00a0 | 64.17\u00a0 | |||||||||||||||||||||
| Exercised | (1,494) | 2.74\u00a0 | $ | 114,089\u00a0 | |||||||||||||||||||
| Canceled | (82) | 6.94\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2020 | 2,532\u00a0 | $ | 1.96\u00a0 | 3.7 | $ | 439,268\u00a0 | |||||||||||||||||
| Vested and expected to vest at December 31, 2020 | 2,532\u00a0 | $ | 1.96\u00a0 | 3.7 | $ | 439,268\u00a0 | |||||||||||||||||
| Exercisable at December 31, 2020 | 2,089\u00a0 | $ | 1.95\u00a0 | 3.7 | $ | 362,526\u00a0 |
| Options Outstanding | Options Exercisable | |||||||||||||||||||||||||||||||
| Range of Exercise Prices | Number of Shares | Weighted- Average Remaining Life | Weighted- Average Exercise Price | Number of Shares | Weighted- Average Exercise Price | |||||||||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | ||||||||||||||||||||||||||||||
$0.70 \u2014\u2013 $1.11 | 555\u00a0 | 4.2 | $ | 0.85\u00a0 | 448\u00a0 | $ | 0.83\u00a0 | |||||||||||||||||||||||||
$1.29 \u2014\u2013 $1.29 | 1,000\u00a0 | 3.7 | 1.29\u00a0 | 813\u00a0 | 1.29\u00a0 | |||||||||||||||||||||||||||
$1.31 \u2014\u2013 $1.31 | 670\u00a0 | 3.3 | 1.31\u00a0 | 587\u00a0 | 1.31\u00a0 | |||||||||||||||||||||||||||
$1.37 \u2014\u2013 $14.58 | 296\u00a0 | 3.6 | 5.56\u00a0 | 235\u00a0 | 6.37\u00a0 | |||||||||||||||||||||||||||
$64.17 \u2014\u2013 $64.17 | 11\u00a0 | 6.3 | 64.17\u00a0 | 6\u00a0 | 64.17\u00a0 | |||||||||||||||||||||||||||
| Total | 2,532\u00a0 | 3.7 | $ | 1.96\u00a0 | 2,089\u00a0 | $ | 1.95\u00a0 |
| Number of Shares Outstanding | Weighted- Average Fair Value per Share at Grant Date | Weighted- Average Remaining Contractual Term | Aggregate Intrinsic Value (1) | ||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | |||||||||||||||||||||
| Outstanding at December 31, 2017 | 3,505\u00a0 | $ | 2.03\u00a0 | ||||||||||||||||||||
| Granted | 3,152\u00a0 | 4.45\u00a0 | |||||||||||||||||||||
| Vested | (1,399) | 2.75\u00a0 | $ | 6,657\u00a0 | |||||||||||||||||||
| Canceled | (906) | 2.17\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2018 | 4,352\u00a0 | $ | 3.52\u00a0 | ||||||||||||||||||||
| Granted | 2,112\u00a0 | 11.50\u00a0 | |||||||||||||||||||||
| Vested | (1,707) | 3.87\u00a0 | $ | 27,156\u00a0 | |||||||||||||||||||
| Canceled | (494) | 4.81\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2019 | 4,263\u00a0 | $ | 7.19\u00a0 | ||||||||||||||||||||
| Granted | 1,550\u00a0 | 55.66 | |||||||||||||||||||||
| Vested | (2,085) | 7.26 | $ | 125,578\u00a0 | |||||||||||||||||||
| Canceled | (140) | 19.47 | |||||||||||||||||||||
| Outstanding at December 31, 2020 | 3,588\u00a0 | $ | 27.61\u00a0 | 1.08 | $ | 629,633\u00a0 | |||||||||||||||||
| Expected to vest at December 31, 2020 | 3,588\u00a0 | $ | 27.61\u00a0 | 1.08 | $ | 629,633\u00a0 |
| Number of Shares Outstanding | Weighted- Average Fair Value per Share at Grant Date | Weighted- Average Remaining Contractual Term | Aggregate Intrinsic Value (1) | ||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | |||||||||||||||||||||
| Outstanding at December 31, 2017 | \u2014\u00a0 | ||||||||||||||||||||||
| Granted | 1,477\u00a0 | $ | 4.65\u00a0 | ||||||||||||||||||||
| Vested | \u2014\u00a0 | ||||||||||||||||||||||
| Canceled | (147) | ||||||||||||||||||||||
| Outstanding at December 31, 2018 | 1,330\u00a0 | $ | 4.66\u00a0 | ||||||||||||||||||||
| Granted | 1,052\u00a0 | 9.48\u00a0 | |||||||||||||||||||||
| Vested | (1,063) | 4.62\u00a0 | 10,818\u00a0 | ||||||||||||||||||||
| Canceled | (364) | 5.16\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2019 | 955\u00a0 | $ | 9.83\u00a0 | ||||||||||||||||||||
| Granted | 989\u00a0 | 31.12\u00a0 | |||||||||||||||||||||
| Vested | (1,450) | 10.20 | $ | 52,144\u00a0 | |||||||||||||||||||
| Canceled | \u2014\u00a0 | \u2014\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2020 | 494\u00a0 | $ | 51.10\u00a0 | 0.2 | $ | 86,668\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| Proceeds from common stock issued under ESPP | $ | 4,304\u00a0 | $ | 1,692\u00a0 | $ | 397\u00a0 | |||||||||||
| Shares of common stock issued | 347\u00a0 | 315\u00a0 | 439\u00a0 | ||||||||||||||
| Weighted-average price per share | $ | 12.41\u00a0 | $ | 5.37\u00a0 | $ | 0.90\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| Weighted average grant date fair value | $ | 38.45 | $ | 9.16 | $ | 2.83 | |||||||||||
| Expected term (in years) | 3.8 | 3.8 | 4.0 | ||||||||||||||
| Expected volatility | 86.4% | 89.1% | 88.5% | ||||||||||||||
| Annual risk-free rate of return | 0.1% | 2.1% | 2.6% | ||||||||||||||
| Dividend yield | \u2014% | \u2014% | \u2014% |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Cost of revenues | $ | 3,759\u00a0 | $ | 1,650\u00a0 | $ | 1,071\u00a0 | |||||||||||
| Research and development | 12,701\u00a0 | 4,897\u00a0 | 2,940\u00a0 | ||||||||||||||
| Sales and marketing | 11,548\u00a0 | 5,678\u00a0 | 3,074\u00a0 | ||||||||||||||
| General and administrative | 14,495\u00a0 | 7,216\u00a0 | 4,347\u00a0 | ||||||||||||||
| Restructuring | \u2014\u00a0 | 735\u00a0 | \u2014\u00a0 | ||||||||||||||
| Total | $ | 42,503\u00a0 | $ | 20,176\u00a0 | $ | 11,432\u00a0 | |||||||||||
| Income tax benefit included in the provision for incomes taxes | $ | 61,389\u00a0 | $ | 8,185\u00a0 | $ | \u2014\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Stock options, RSUs, and PSUs | $ | 39,841\u00a0 | $ | 19,216\u00a0 | $ | 10,691\u00a0 | |||||||||||
| Employee stock purchase plan | 2,662\u00a0 | 960\u00a0 | 741\u00a0 | ||||||||||||||
| Total | $ | 42,503\u00a0 | $ | 20,176\u00a0 | $ | 11,432\u00a0 |
| Number of Shares Outstanding | Weighted- Average Exercise\u00a0Price per Share | Weighted- Average Remaining Contractual Term | Aggregate Intrinsic Value (1) | ||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | |||||||||||||||||||||
| Outstanding at December 31, 2017 | 8,426\u00a0 | $ | 1.77\u00a0 | ||||||||||||||||||||
| Granted | 213\u00a0 | 4.43\u00a0 | |||||||||||||||||||||
| Exercised | (1,346) | 1.75\u00a0 | $ | 5,096\u00a0 | |||||||||||||||||||
| Canceled | (521) | 2.94\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2018 | 6,772\u00a0 | $ | 1.76\u00a0 | ||||||||||||||||||||
| Granted | 43\u00a0 | 14.58\u00a0 | |||||||||||||||||||||
| Exercised | (2,616) | 1.22\u00a0 | $ | 31,093\u00a0 | |||||||||||||||||||
| Canceled | (102) | 4.07\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2019 | 4,097\u00a0 | $ | 2.18\u00a0 | ||||||||||||||||||||
| Granted | 11\u00a0 | 64.17\u00a0 | |||||||||||||||||||||
| Exercised | (1,494) | 2.74\u00a0 | $ | 114,089\u00a0 | |||||||||||||||||||
| Canceled | (82) | 6.94\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2020 | 2,532\u00a0 | $ | 1.96\u00a0 | 3.7 | $ | 439,268\u00a0 | |||||||||||||||||
| Vested and expected to vest at December 31, 2020 | 2,532\u00a0 | $ | 1.96\u00a0 | 3.7 | $ | 439,268\u00a0 | |||||||||||||||||
| Exercisable at December 31, 2020 | 2,089\u00a0 | $ | 1.95\u00a0 | 3.7 | $ | 362,526\u00a0 |
| Options Outstanding | Options Exercisable | |||||||||||||||||||||||||||||||
| Range of Exercise Prices | Number of Shares | Weighted- Average Remaining Life | Weighted- Average Exercise Price | Number of Shares | Weighted- Average Exercise Price | |||||||||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | ||||||||||||||||||||||||||||||
$0.70 \u2014\u2013 $1.11 | 555\u00a0 | 4.2 | $ | 0.85\u00a0 | 448\u00a0 | $ | 0.83\u00a0 | |||||||||||||||||||||||||
$1.29 \u2014\u2013 $1.29 | 1,000\u00a0 | 3.7 | 1.29\u00a0 | 813\u00a0 | 1.29\u00a0 | |||||||||||||||||||||||||||
$1.31 \u2014\u2013 $1.31 | 670\u00a0 | 3.3 | 1.31\u00a0 | 587\u00a0 | 1.31\u00a0 | |||||||||||||||||||||||||||
$1.37 \u2014\u2013 $14.58 | 296\u00a0 | 3.6 | 5.56\u00a0 | 235\u00a0 | 6.37\u00a0 | |||||||||||||||||||||||||||
$64.17 \u2014\u2013 $64.17 | 11\u00a0 | 6.3 | 64.17\u00a0 | 6\u00a0 | 64.17\u00a0 | |||||||||||||||||||||||||||
| Total | 2,532\u00a0 | 3.7 | $ | 1.96\u00a0 | 2,089\u00a0 | $ | 1.95\u00a0 |
| Number of Shares Outstanding | Weighted- Average Fair Value per Share at Grant Date | Weighted- Average Remaining Contractual Term | Aggregate Intrinsic Value (1) | ||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | |||||||||||||||||||||
| Outstanding at December 31, 2017 | 3,505\u00a0 | $ | 2.03\u00a0 | ||||||||||||||||||||
| Granted | 3,152\u00a0 | 4.45\u00a0 | |||||||||||||||||||||
| Vested | (1,399) | 2.75\u00a0 | $ | 6,657\u00a0 | |||||||||||||||||||
| Canceled | (906) | 2.17\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2018 | 4,352\u00a0 | $ | 3.52\u00a0 | ||||||||||||||||||||
| Granted | 2,112\u00a0 | 11.50\u00a0 | |||||||||||||||||||||
| Vested | (1,707) | 3.87\u00a0 | $ | 27,156\u00a0 | |||||||||||||||||||
| Canceled | (494) | 4.81\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2019 | 4,263\u00a0 | $ | 7.19\u00a0 | ||||||||||||||||||||
| Granted | 1,550\u00a0 | 55.66 | |||||||||||||||||||||
| Vested | (2,085) | 7.26 | $ | 125,578\u00a0 | |||||||||||||||||||
| Canceled | (140) | 19.47 | |||||||||||||||||||||
| Outstanding at December 31, 2020 | 3,588\u00a0 | $ | 27.61\u00a0 | 1.08 | $ | 629,633\u00a0 | |||||||||||||||||
| Expected to vest at December 31, 2020 | 3,588\u00a0 | $ | 27.61\u00a0 | 1.08 | $ | 629,633\u00a0 |
| Number of Shares Outstanding | Weighted- Average Fair Value per Share at Grant Date | Weighted- Average Remaining Contractual Term | Aggregate Intrinsic Value (1) | ||||||||||||||||||||
| (In thousands) | (Years) | (In thousands) | |||||||||||||||||||||
| Outstanding at December 31, 2017 | \u2014\u00a0 | ||||||||||||||||||||||
| Granted | 1,477\u00a0 | $ | 4.65\u00a0 | ||||||||||||||||||||
| Vested | \u2014\u00a0 | ||||||||||||||||||||||
| Canceled | (147) | ||||||||||||||||||||||
| Outstanding at December 31, 2018 | 1,330\u00a0 | $ | 4.66\u00a0 | ||||||||||||||||||||
| Granted | 1,052\u00a0 | 9.48\u00a0 | |||||||||||||||||||||
| Vested | (1,063) | 4.62\u00a0 | 10,818\u00a0 | ||||||||||||||||||||
| Canceled | (364) | 5.16\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2019 | 955\u00a0 | $ | 9.83\u00a0 | ||||||||||||||||||||
| Granted | 989\u00a0 | 31.12\u00a0 | |||||||||||||||||||||
| Vested | (1,450) | 10.20 | $ | 52,144\u00a0 | |||||||||||||||||||
| Canceled | \u2014\u00a0 | \u2014\u00a0 | |||||||||||||||||||||
| Outstanding at December 31, 2020 | 494\u00a0 | $ | 51.10\u00a0 | 0.2 | $ | 86,668\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| Proceeds from common stock issued under ESPP | $ | 4,304\u00a0 | $ | 1,692\u00a0 | $ | 397\u00a0 | |||||||||||
| Shares of common stock issued | 347\u00a0 | 315\u00a0 | 439\u00a0 | ||||||||||||||
| Weighted-average price per share | $ | 12.41\u00a0 | $ | 5.37\u00a0 | $ | 0.90\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| United States | $ | 112,727\u00a0 | $ | 85,520\u00a0 | $ | (14,322) | |||||||||||
| Foreign | 6,683\u00a0 | 4,594\u00a0 | 4,093\u00a0 | ||||||||||||||
| Income (loss) before income taxes | $ | 119,410\u00a0 | $ | 90,114\u00a0 | $ | (10,229) |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Current: | |||||||||||||||||
| Federal | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | |||||||||||
| State | 636\u00a0 | 327\u00a0 | 42\u00a0 | ||||||||||||||
| Foreign | 1,896\u00a0 | 1,589\u00a0 | 1,233\u00a0 | ||||||||||||||
| 2,532\u00a0 | 1,916\u00a0 | 1,275\u00a0 | |||||||||||||||
| Deferred: | |||||||||||||||||
| Federal | (13,445) | (56,959) | (35) | ||||||||||||||
| State | (3,672) | (17,458) | (21) | ||||||||||||||
| Foreign | \u2014\u00a0 | 1,467\u00a0 | 179\u00a0 | ||||||||||||||
| (17,117) | (72,950) | 123\u00a0 | |||||||||||||||
| Income taxes (benefit) provision | $ | (14,585) | $ | (71,034) | $ | 1,398\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Income tax (benefit) provision at statutory federal rate | $ | 25,076\u00a0 | $ | 18,929\u00a0 | $ | (2,148) | |||||||||||
| State taxes, net of federal benefit | (3,098) | (17,197) | 17\u00a0 | ||||||||||||||
| Change in valuation allowance | \u2014\u00a0 | (71,300) | 8,198\u00a0 | ||||||||||||||
| Foreign tax rate and tax law differential | 611\u00a0 | 1,206\u00a0 | 313\u00a0 | ||||||||||||||
| Tax credits | (5,835) | (1,803) | (378) | ||||||||||||||
| Stock-based compensation | (50,818) | (8,072) | (953) | ||||||||||||||
| Other permanent items | (253) | 31\u00a0 | 235\u00a0 | ||||||||||||||
| Other nondeductible/nontaxable items | 1,525\u00a0 | 2,765\u00a0 | (5,112) | ||||||||||||||
| Uncertain tax positions | 1,530\u00a0 | 504\u00a0 | 107\u00a0 | ||||||||||||||
| GILTI | \u2014\u00a0 | 1,086\u00a0 | 917\u00a0 | ||||||||||||||
| Section 162(m) | 11,469\u00a0 | 2,817\u00a0 | 202\u00a0 | ||||||||||||||
| Warrant mark-to-mark adjustment | 5,208\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Income tax (benefit) provision | $ | (14,585) | $ | (71,034) | $ | 1,398\u00a0 |
| December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| Deferred tax assets: | |||||||||||
| Allowances and reserves | $ | 13,146\u00a0 | $ | 10,726\u00a0 | |||||||
| Net operating loss and tax credit carryforwards | 53,116\u00a0 | 54,369\u00a0 | |||||||||
| Stock-based compensation | 4,598\u00a0 | 3,753\u00a0 | |||||||||
| Deferred revenue | 20,765\u00a0 | 16,736\u00a0 | |||||||||
| Fixed assets and intangibles | 8,706\u00a0 | 2,720\u00a0 | |||||||||
| Sec. 163(j) interest carryforward | 4,401\u00a0 | \u2014\u00a0 | |||||||||
| Other | 7,007\u00a0 | 1,109\u00a0 | |||||||||
| Subtotal | 111,739\u00a0 | 89,413\u00a0 | |||||||||
| Total deferred tax assets | 111,739\u00a0 | 89,413\u00a0 | |||||||||
| Deferred tax liabilities: | |||||||||||
| Goodwill | (1,719) | (1,368) | |||||||||
| Unremitted foreign earnings | (7) | (5) | |||||||||
| Deferred cost of goods sold | (17,545) | (14,374) | |||||||||
| Total deferred tax liabilities | (19,271) | (15,747) | |||||||||
| Net deferred tax asset | $ | 92,468\u00a0 | $ | 73,666\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| Unrecognized tax benefits\u2014at beginning of year | $ | 6,589\u00a0 | $ | 6,325\u00a0 | $ | 6,106\u00a0 | |||||||||||
| Decreases in balances related to tax positions taken in prior years | \u2014\u00a0 | (370) | \u2014\u00a0 | ||||||||||||||
| Increases in balances related to tax positions taken in current year | 2,006\u00a0 | 771\u00a0 | 329\u00a0 | ||||||||||||||
| Lapses in statutes of limitations | (174) | (137) | (110) | ||||||||||||||
| Unrecognized tax benefits\u2014at end of year | $ | 8,421\u00a0 | $ | 6,589\u00a0 | $ | 6,325\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| United States | $ | 112,727\u00a0 | $ | 85,520\u00a0 | $ | (14,322) | |||||||||||
| Foreign | 6,683\u00a0 | 4,594\u00a0 | 4,093\u00a0 | ||||||||||||||
| Income (loss) before income taxes | $ | 119,410\u00a0 | $ | 90,114\u00a0 | $ | (10,229) |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Current: | |||||||||||||||||
| Federal | $ | \u2014\u00a0 | $ | \u2014\u00a0 | $ | \u2014\u00a0 | |||||||||||
| State | 636\u00a0 | 327\u00a0 | 42\u00a0 | ||||||||||||||
| Foreign | 1,896\u00a0 | 1,589\u00a0 | 1,233\u00a0 | ||||||||||||||
| 2,532\u00a0 | 1,916\u00a0 | 1,275\u00a0 | |||||||||||||||
| Deferred: | |||||||||||||||||
| Federal | (13,445) | (56,959) | (35) | ||||||||||||||
| State | (3,672) | (17,458) | (21) | ||||||||||||||
| Foreign | \u2014\u00a0 | 1,467\u00a0 | 179\u00a0 | ||||||||||||||
| (17,117) | (72,950) | 123\u00a0 | |||||||||||||||
| Income taxes (benefit) provision | $ | (14,585) | $ | (71,034) | $ | 1,398\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Income tax (benefit) provision at statutory federal rate | $ | 25,076\u00a0 | $ | 18,929\u00a0 | $ | (2,148) | |||||||||||
| State taxes, net of federal benefit | (3,098) | (17,197) | 17\u00a0 | ||||||||||||||
| Change in valuation allowance | \u2014\u00a0 | (71,300) | 8,198\u00a0 | ||||||||||||||
| Foreign tax rate and tax law differential | 611\u00a0 | 1,206\u00a0 | 313\u00a0 | ||||||||||||||
| Tax credits | (5,835) | (1,803) | (378) | ||||||||||||||
| Stock-based compensation | (50,818) | (8,072) | (953) | ||||||||||||||
| Other permanent items | (253) | 31\u00a0 | 235\u00a0 | ||||||||||||||
| Other nondeductible/nontaxable items | 1,525\u00a0 | 2,765\u00a0 | (5,112) | ||||||||||||||
| Uncertain tax positions | 1,530\u00a0 | 504\u00a0 | 107\u00a0 | ||||||||||||||
| GILTI | \u2014\u00a0 | 1,086\u00a0 | 917\u00a0 | ||||||||||||||
| Section 162(m) | 11,469\u00a0 | 2,817\u00a0 | 202\u00a0 | ||||||||||||||
| Warrant mark-to-mark adjustment | 5,208\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Income tax (benefit) provision | $ | (14,585) | $ | (71,034) | $ | 1,398\u00a0 |
| December 31, | |||||||||||
| 2020 | 2019 | ||||||||||
| Deferred tax assets: | |||||||||||
| Allowances and reserves | $ | 13,146\u00a0 | $ | 10,726\u00a0 | |||||||
| Net operating loss and tax credit carryforwards | 53,116\u00a0 | 54,369\u00a0 | |||||||||
| Stock-based compensation | 4,598\u00a0 | 3,753\u00a0 | |||||||||
| Deferred revenue | 20,765\u00a0 | 16,736\u00a0 | |||||||||
| Fixed assets and intangibles | 8,706\u00a0 | 2,720\u00a0 | |||||||||
| Sec. 163(j) interest carryforward | 4,401\u00a0 | \u2014\u00a0 | |||||||||
| Other | 7,007\u00a0 | 1,109\u00a0 | |||||||||
| Subtotal | 111,739\u00a0 | 89,413\u00a0 | |||||||||
| Total deferred tax assets | 111,739\u00a0 | 89,413\u00a0 | |||||||||
| Deferred tax liabilities: | |||||||||||
| Goodwill | (1,719) | (1,368) | |||||||||
| Unremitted foreign earnings | (7) | (5) | |||||||||
| Deferred cost of goods sold | (17,545) | (14,374) | |||||||||
| Total deferred tax liabilities | (19,271) | (15,747) | |||||||||
| Net deferred tax asset | $ | 92,468\u00a0 | $ | 73,666\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| Unrecognized tax benefits\u2014at beginning of year | $ | 6,589\u00a0 | $ | 6,325\u00a0 | $ | 6,106\u00a0 | |||||||||||
| Decreases in balances related to tax positions taken in prior years | \u2014\u00a0 | (370) | \u2014\u00a0 | ||||||||||||||
| Increases in balances related to tax positions taken in current year | 2,006\u00a0 | 771\u00a0 | 329\u00a0 | ||||||||||||||
| Lapses in statutes of limitations | (174) | (137) | (110) | ||||||||||||||
| Unrecognized tax benefits\u2014at end of year | $ | 8,421\u00a0 | $ | 6,589\u00a0 | $ | 6,325\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands, except per share data) | |||||||||||||||||
| Numerator: | |||||||||||||||||
| Net income (loss) | $ | 133,995\u00a0 | $ | 161,148\u00a0 | $ | (11,627) | |||||||||||
| Notes due 2023 interest and financing costs, net | 177\u00a0 | 1,088\u00a0 | \u2014\u00a0 | ||||||||||||||
| Adjusted net income (loss) | $ | 134,172\u00a0 | $ | 162,236\u00a0 | $ | (11,627) | |||||||||||
| Denominator: | |||||||||||||||||
Shares used in basic per share amounts: | |||||||||||||||||
| Weighted average common shares outstanding | 125,561\u00a0 | 116,713\u00a0 | 99,619\u00a0 | ||||||||||||||
Shares used in diluted per share amounts: | |||||||||||||||||
| Weighted average common shares outstanding | 125,561\u00a0 | 116,713\u00a0 | 99,619\u00a0 | ||||||||||||||
| Effect of dilutive securities: | |||||||||||||||||
| Employee stock-based awards | 6,997\u00a0 | 8,964\u00a0 | \u2014\u00a0 | ||||||||||||||
| Warrants (issued in conjunction with Notes due 2024) | 4,011\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Notes due 2024 | 4,449\u00a0 | 451\u00a0 | \u2014\u00a0 | ||||||||||||||
| Notes due 2023 | 900\u00a0 | 5,516\u00a0 | \u2014\u00a0 | ||||||||||||||
| Weighted average common shares outstanding for diluted calculation | 141,918\u00a0 | 131,644\u00a0 | 99,619\u00a0 | ||||||||||||||
| Basic and diluted net income (loss) per share | |||||||||||||||||
| Net income (loss) per share, basic | $ | 1.07\u00a0 | $ | 1.38\u00a0 | $ | (0.12) | |||||||||||
| Net income (loss) per share, diluted | $ | 0.95\u00a0 | $ | 1.23\u00a0 | $ | (0.12) |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Employee stock options | 7\u00a0 | 27\u00a0 | 7,710\u00a0 | ||||||||||||||
| RSUs and PSUs | 36\u00a0 | 158\u00a0 | 5,273\u00a0 | ||||||||||||||
| Warrants (issued in conjunction with Notes due 2024) | \u2014\u00a0 | 300\u00a0 | \u2014\u00a0 | ||||||||||||||
Warrants (issued in conjunction with Notes due 2025) | 1,254\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Notes due 2025 | 197\u00a0 | \u2014\u00a0 | |||||||||||||||
| Notes due 2023 | \u2014\u00a0 | \u2014\u00a0 | 11,701\u00a0 | ||||||||||||||
| Total | 1,494\u00a0 | 485\u00a0 | 24,684\u00a0 |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands, except per share data) | |||||||||||||||||
| Numerator: | |||||||||||||||||
| Net income (loss) | $ | 133,995\u00a0 | $ | 161,148\u00a0 | $ | (11,627) | |||||||||||
| Notes due 2023 interest and financing costs, net | 177\u00a0 | 1,088\u00a0 | \u2014\u00a0 | ||||||||||||||
| Adjusted net income (loss) | $ | 134,172\u00a0 | $ | 162,236\u00a0 | $ | (11,627) | |||||||||||
| Denominator: | |||||||||||||||||
Shares used in basic per share amounts: | |||||||||||||||||
| Weighted average common shares outstanding | 125,561\u00a0 | 116,713\u00a0 | 99,619\u00a0 | ||||||||||||||
Shares used in diluted per share amounts: | |||||||||||||||||
| Weighted average common shares outstanding | 125,561\u00a0 | 116,713\u00a0 | 99,619\u00a0 | ||||||||||||||
| Effect of dilutive securities: | |||||||||||||||||
| Employee stock-based awards | 6,997\u00a0 | 8,964\u00a0 | \u2014\u00a0 | ||||||||||||||
| Warrants (issued in conjunction with Notes due 2024) | 4,011\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Notes due 2024 | 4,449\u00a0 | 451\u00a0 | \u2014\u00a0 | ||||||||||||||
| Notes due 2023 | 900\u00a0 | 5,516\u00a0 | \u2014\u00a0 | ||||||||||||||
| Weighted average common shares outstanding for diluted calculation | 141,918\u00a0 | 131,644\u00a0 | 99,619\u00a0 | ||||||||||||||
| Basic and diluted net income (loss) per share | |||||||||||||||||
| Net income (loss) per share, basic | $ | 1.07\u00a0 | $ | 1.38\u00a0 | $ | (0.12) | |||||||||||
| Net income (loss) per share, diluted | $ | 0.95\u00a0 | $ | 1.23\u00a0 | $ | (0.12) |
| Years Ended December 31, | |||||||||||||||||
| 2020 | 2019 | 2018 | |||||||||||||||
| (In thousands) | |||||||||||||||||
| Employee stock options | 7\u00a0 | 27\u00a0 | 7,710\u00a0 | ||||||||||||||
| RSUs and PSUs | 36\u00a0 | 158\u00a0 | 5,273\u00a0 | ||||||||||||||
| Warrants (issued in conjunction with Notes due 2024) | \u2014\u00a0 | 300\u00a0 | \u2014\u00a0 | ||||||||||||||
Warrants (issued in conjunction with Notes due 2025) | 1,254\u00a0 | \u2014\u00a0 | \u2014\u00a0 | ||||||||||||||
| Notes due 2025 | 197\u00a0 | \u2014\u00a0 | |||||||||||||||
| Notes due 2023 | \u2014\u00a0 | \u2014\u00a0 | 11,701\u00a0 | ||||||||||||||
| Total | 1,494\u00a0 | 485\u00a0 | 24,684\u00a0 |
| December\u00a031, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| United States | $ | 19,870\u00a0 | $ | 16,754\u00a0 | |||||||
| China | 9,948\u00a0 | 4,635\u00a0 | |||||||||
| Mexico | 4,808\u00a0 | 3,510\u00a0 | |||||||||
| India | 4,371\u00a0 | 1,315\u00a0 | |||||||||
| New Zealand | 3,837\u00a0 | 2,638\u00a0 | |||||||||
| Other | 151\u00a0 | 84\u00a0 | |||||||||
| Total | $ | 42,985\u00a0 | $ | 28,936\u00a0 |
| December\u00a031, | |||||||||||
| 2020 | 2019 | ||||||||||
| (In thousands) | |||||||||||
| United States | $ | 19,870\u00a0 | $ | 16,754\u00a0 | |||||||
| China | 9,948\u00a0 | 4,635\u00a0 | |||||||||
| Mexico | 4,808\u00a0 | 3,510\u00a0 | |||||||||
| India | 4,371\u00a0 | 1,315\u00a0 | |||||||||
| New Zealand | 3,837\u00a0 | 2,638\u00a0 | |||||||||
| Other | 151\u00a0 | 84\u00a0 | |||||||||
| Total | $ | 42,985\u00a0 | $ | 28,936\u00a0 |
| Cash consideration | $ | 25,000\u00a0 | ||||||
| Common stock issued | 32,319\u00a0 | |||||||
| Total | $ | 57,319\u00a0 |
| Intangible assets | $ | 36,200\u00a0 | ||||||
| Goodwill | 21,119\u00a0 | |||||||
| Net assets acquired | $ | 57,319\u00a0 |
| Preliminary Fair Value | Useful Life | |||||||||||||
| (In thousands) | (Years) | |||||||||||||
| Developed technology | $ | 13,100\u00a0 | 6 | |||||||||||
| Customer relationship | 23,100\u00a0 | 9 | ||||||||||||
| Total identifiable intangible assets | $ | 36,200\u00a0 |
| Cash Purchase Price | Issuance of Common Stock | Total Consideration | % of Total Consideration | ||||||||||||||||||||
| (In thousands) | |||||||||||||||||||||||
| Developed technology and goodwill | $ | 15,000\u00a0 | $ | 19,219\u00a0 | $ | 34,219\u00a0 | 60\u00a0 | % | |||||||||||||||
| Customer relationship | 10,000\u00a0 | 13,100\u00a0 | 23,100\u00a0 | 40\u00a0 | % | ||||||||||||||||||
| Total consideration | $ | 25,000\u00a0 | $ | 32,319\u00a0 | $ | 57,319\u00a0 | 100\u00a0 | % |
| Cash consideration | $ | 25,000\u00a0 | ||||||
| Common stock issued | 32,319\u00a0 | |||||||
| Total | $ | 57,319\u00a0 |
| Intangible assets | $ | 36,200\u00a0 | ||||||
| Goodwill | 21,119\u00a0 | |||||||
| Net assets acquired | $ | 57,319\u00a0 |
| Cash Purchase Price | Issuance of Common Stock | Total Consideration | % of Total Consideration | ||||||||||||||||||||
| (In thousands) | |||||||||||||||||||||||
| Developed technology and goodwill | $ | 15,000\u00a0 | $ | 19,219\u00a0 | $ | 34,219\u00a0 | 60\u00a0 | % | |||||||||||||||
| Customer relationship | 10,000\u00a0 | 13,100\u00a0 | 23,100\u00a0 | 40\u00a0 | % | ||||||||||||||||||
| Total consideration | $ | 25,000\u00a0 | $ | 32,319\u00a0 | $ | 57,319\u00a0 | 100\u00a0 | % |
| Preliminary Fair Value | Useful Life | |||||||||||||
| (In thousands) | (Years) | |||||||||||||
| Developed technology | $ | 13,100\u00a0 | 6 | |||||||||||
| Customer relationship | 23,100\u00a0 | 9 | ||||||||||||
| Total identifiable intangible assets | $ | 36,200\u00a0 |
| Three Months Ended | |||||||||||||||||||||||
| March 31, 2020 | June 30, 2020 | September 30, 2020 | December 31, 2020 | ||||||||||||||||||||
| Net revenues | $ | 205,545\u00a0 | $ | 125,538\u00a0 | $ | 178,503\u00a0 | $ | 264,839\u00a0 | |||||||||||||||
| Cost of revenues | 124,870\u00a0 | 77,151\u00a0 | 83,522\u00a0 | 142,901\u00a0 | |||||||||||||||||||
| Gross profit | 80,675\u00a0 | 48,387\u00a0 | 94,981\u00a0 | 121,938\u00a0 | |||||||||||||||||||
| Operating expenses: | |||||||||||||||||||||||
| Research and development | 11,876\u00a0 | 13,192\u00a0 | 15,052\u00a0 | 15,801\u00a0 | |||||||||||||||||||
| Sales and marketing | 11,772\u00a0 | 12,371\u00a0 | 14,645\u00a0 | 14,139\u00a0 | |||||||||||||||||||
| General and administrative | 12,315\u00a0 | 11,970\u00a0 | 13,525\u00a0 | 12,884\u00a0 | |||||||||||||||||||
| Total operating expenses | 35,963\u00a0 | 37,533\u00a0 | 43,222\u00a0 | 42,824\u00a0 | |||||||||||||||||||
| Income from operations | 44,712\u00a0 | 10,854\u00a0 | 51,759\u00a0 | 79,114\u00a0 | |||||||||||||||||||
| Other income (expense), net | |||||||||||||||||||||||
| Interest Income | 1,091\u00a0 | 282\u00a0 | 110\u00a0 | 673\u00a0 | |||||||||||||||||||
| Interest expense | (3,155) | (5,952) | (5,993) | (5,901) | |||||||||||||||||||
| Other income (expense) | (924) | 653\u00a0 | (1,031) | (2,534) | |||||||||||||||||||
| Change in fair value of derivatives | 15,344\u00a0 | (59,692) | \u2014\u00a0 | \u2014\u00a0 | |||||||||||||||||||
| Total other income (expense), net | 12,356\u00a0 | (64,709) | (6,914) | (7,762) | |||||||||||||||||||
| Income (loss) before income taxes | 57,068\u00a0 | (53,855) | 44,845\u00a0 | 71,352\u00a0 | |||||||||||||||||||
| Income tax benefit (provision) | 11,868\u00a0 | 6,561\u00a0 | (5,483) | 1,639\u00a0 | |||||||||||||||||||
| Net income (loss) | $ | 68,936\u00a0 | $ | (47,294) | $ | 39,362\u00a0 | $ | 72,991\u00a0 | |||||||||||||||
| Net income (loss) per share, basic | $ | 0.56\u00a0 | $ | (0.38) | $ | 0.31\u00a0 | $ | 0.57\u00a0 | |||||||||||||||
| Net income (loss) per share, diluted | $ | 0.50\u00a0 | $ | (0.38) | $ | 0.28\u00a0 | $ | 0.50\u00a0 |
| Three Months Ended | |||||||||||||||||||||||
| March\u00a031, 2019 | June 30, 2019 | September 30, 2019 | December 31, 2019 | ||||||||||||||||||||
| Net revenues | $ | 100,150\u00a0 | $ | 134,094\u00a0 | $ | 180,057\u00a0 | $ | 210,032\u00a0 | |||||||||||||||
| Cost of revenues | 66,811\u00a0 | 88,775\u00a0 | 115,351\u00a0 | 132,151\u00a0 | |||||||||||||||||||
| Gross profit | 33,339\u00a0 | 45,319\u00a0 | 64,706\u00a0 | 77,881\u00a0 | |||||||||||||||||||
| Operating expenses: | |||||||||||||||||||||||
| Research and development | 8,524\u00a0 | 9,604\u00a0 | 11,085\u00a0 | 11,168\u00a0 | |||||||||||||||||||
| Sales and marketing | 7,433\u00a0 | 9,054\u00a0 | 9,551\u00a0 | 10,690\u00a0 | |||||||||||||||||||
| General and administrative | 9,880\u00a0 | 8,583\u00a0 | 9,895\u00a0 | 10,450\u00a0 | |||||||||||||||||||
| Restructuring charges | 368\u00a0 | 631\u00a0 | 469\u00a0 | 1,131\u00a0 | |||||||||||||||||||
| Total operating expenses | 26,205\u00a0 | 27,872\u00a0 | 31,000\u00a0 | 33,439\u00a0 | |||||||||||||||||||
| Income from operations | 7,134\u00a0 | 17,447\u00a0 | 33,706\u00a0 | 44,442\u00a0 | |||||||||||||||||||
| Other expense, net | |||||||||||||||||||||||
| Interest income | 211\u00a0 | 593\u00a0 | 894\u00a0 | 815\u00a0 | |||||||||||||||||||
| Interest expense | (3,751) | (1,351) | (2,286) | (2,303) | |||||||||||||||||||
| Other income (expense), net | (481) | (5,480) | (943) | 1,467\u00a0 | |||||||||||||||||||
| Total other expense, net | (4,021) | (6,238) | (2,335) | (21) | |||||||||||||||||||
| Income before income taxes | 3,113\u00a0 | 11,209\u00a0 | 31,371\u00a0 | 44,421\u00a0 | |||||||||||||||||||
| Income tax benefit (provision) | (348) | (591) | (272) | 72,245\u00a0 | |||||||||||||||||||
| Net income | $ | 2,765\u00a0 | $ | 10,618\u00a0 | $ | 31,099\u00a0 | $ | 116,666\u00a0 | |||||||||||||||
| Net income per share, basic | $ | 0.03\u00a0 | $ | 0.09\u00a0 | $ | 0.25\u00a0 | $ | 0.95\u00a0 | |||||||||||||||
| Net income per diluted share | $ | 0.02\u00a0 | $ | 0.08\u00a0 | $ | 0.23\u00a0 | $ | 0.88\u00a0 |
| Three Months Ended | |||||||||||||||||||||||
| March 31, 2020 | June 30, 2020 | September 30, 2020 | December 31, 2020 | ||||||||||||||||||||
| Net revenues | $ | 205,545\u00a0 | $ | 125,538\u00a0 | $ | 178,503\u00a0 | $ | 264,839\u00a0 | |||||||||||||||
| Cost of revenues | 124,870\u00a0 | 77,151\u00a0 | 83,522\u00a0 | 142,901\u00a0 | |||||||||||||||||||
| Gross profit | 80,675\u00a0 | 48,387\u00a0 | 94,981\u00a0 | 121,938\u00a0 | |||||||||||||||||||
| Operating expenses: | |||||||||||||||||||||||
| Research and development | 11,876\u00a0 | 13,192\u00a0 | 15,052\u00a0 | 15,801\u00a0 | |||||||||||||||||||
| Sales and marketing | 11,772\u00a0 | 12,371\u00a0 | 14,645\u00a0 | 14,139\u00a0 | |||||||||||||||||||
| General and administrative | 12,315\u00a0 | 11,970\u00a0 | 13,525\u00a0 | 12,884\u00a0 | |||||||||||||||||||
| Total operating expenses | 35,963\u00a0 | 37,533\u00a0 | 43,222\u00a0 | 42,824\u00a0 | |||||||||||||||||||
| Income from operations | 44,712\u00a0 | 10,854\u00a0 | 51,759\u00a0 | 79,114\u00a0 | |||||||||||||||||||
| Other income (expense), net | |||||||||||||||||||||||
| Interest Income | 1,091\u00a0 | 282\u00a0 | 110\u00a0 | 673\u00a0 | |||||||||||||||||||
| Interest expense | (3,155) | (5,952) | (5,993) | (5,901) | |||||||||||||||||||
| Other income (expense) | (924) | 653\u00a0 | (1,031) | (2,534) | |||||||||||||||||||
| Change in fair value of derivatives | 15,344\u00a0 | (59,692) | \u2014\u00a0 | \u2014\u00a0 | |||||||||||||||||||
| Total other income (expense), net | 12,356\u00a0 | (64,709) | (6,914) | (7,762) | |||||||||||||||||||
| Income (loss) before income taxes | 57,068\u00a0 | (53,855) | 44,845\u00a0 | 71,352\u00a0 | |||||||||||||||||||
| Income tax benefit (provision) | 11,868\u00a0 | 6,561\u00a0 | (5,483) | 1,639\u00a0 | |||||||||||||||||||
| Net income (loss) | $ | 68,936\u00a0 | $ | (47,294) | $ | 39,362\u00a0 | $ | 72,991\u00a0 | |||||||||||||||
| Net income (loss) per share, basic | $ | 0.56\u00a0 | $ | (0.38) | $ | 0.31\u00a0 | $ | 0.57\u00a0 | |||||||||||||||
| Net income (loss) per share, diluted | $ | 0.50\u00a0 | $ | (0.38) | $ | 0.28\u00a0 | $ | 0.50\u00a0 |
| Three Months Ended | |||||||||||||||||||||||
| March\u00a031, 2019 | June 30, 2019 | September 30, 2019 | December 31, 2019 | ||||||||||||||||||||
| Net revenues | $ | 100,150\u00a0 | $ | 134,094\u00a0 | $ | 180,057\u00a0 | $ | 210,032\u00a0 | |||||||||||||||
| Cost of revenues | 66,811\u00a0 | 88,775\u00a0 | 115,351\u00a0 | 132,151\u00a0 | |||||||||||||||||||
| Gross profit | 33,339\u00a0 | 45,319\u00a0 | 64,706\u00a0 | 77,881\u00a0 | |||||||||||||||||||
| Operating expenses: | |||||||||||||||||||||||
| Research and development | 8,524\u00a0 | 9,604\u00a0 | 11,085\u00a0 | 11,168\u00a0 | |||||||||||||||||||
| Sales and marketing | 7,433\u00a0 | 9,054\u00a0 | 9,551\u00a0 | 10,690\u00a0 | |||||||||||||||||||
| General and administrative | 9,880\u00a0 | 8,583\u00a0 | 9,895\u00a0 | 10,450\u00a0 | |||||||||||||||||||
| Restructuring charges | 368\u00a0 | 631\u00a0 | 469\u00a0 | 1,131\u00a0 | |||||||||||||||||||
| Total operating expenses | 26,205\u00a0 | 27,872\u00a0 | 31,000\u00a0 | 33,439\u00a0 | |||||||||||||||||||
| Income from operations | 7,134\u00a0 | 17,447\u00a0 | 33,706\u00a0 | 44,442\u00a0 | |||||||||||||||||||
| Other expense, net | |||||||||||||||||||||||
| Interest income | 211\u00a0 | 593\u00a0 | 894\u00a0 | 815\u00a0 | |||||||||||||||||||
| Interest expense | (3,751) | (1,351) | (2,286) | (2,303) | |||||||||||||||||||
| Other income (expense), net | (481) | (5,480) | (943) | 1,467\u00a0 | |||||||||||||||||||
| Total other expense, net | (4,021) | (6,238) | (2,335) | (21) | |||||||||||||||||||
| Income before income taxes | 3,113\u00a0 | 11,209\u00a0 | 31,371\u00a0 | 44,421\u00a0 | |||||||||||||||||||
| Income tax benefit (provision) | (348) | (591) | (272) | 72,245\u00a0 | |||||||||||||||||||
| Net income | $ | 2,765\u00a0 | $ | 10,618\u00a0 | $ | 31,099\u00a0 | $ | 116,666\u00a0 | |||||||||||||||
| Net income per share, basic | $ | 0.03\u00a0 | $ | 0.09\u00a0 | $ | 0.25\u00a0 | $ | 0.95\u00a0 | |||||||||||||||
| Net income per diluted share | $ | 0.02\u00a0 | $ | 0.08\u00a0 | $ | 0.23\u00a0 | $ | 0.88\u00a0 |