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Organization and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Weighted Average Number of Shares Outstanding and Income Per Share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Numerator for basic and diluted earnings per share: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Net income (loss) | ​ | $ | 48,524 | ​ | $ | (873) | ​ | $ | (46,510) | ​ | $ | (27,558)
Denominator: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Weighted average shares outstanding | ​ |  | 66,192 | ​ |  | 63,496 | ​ |  | 65,139 | ​ |  | 61,159
Dilutive effect of stock-based awards | ​ |  | 6,249 | ​ |  | — | ​ |  | — | ​ |  | —
Diluted weighted average shares outstanding | ​ |  | 72,441 | ​ |  | 63,496 | ​ |  | 65,139 | ​ |  | 61,159
Anti-dilutive stock-based awards excluded | ​ |  | 3,481 | ​ |  | 12,793 | ​ |  | 8,920 | ​ |  | 12,904
Net loss per common share: | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |
Basic | ​ | $ | 0.73 | ​ | $ | (0.01) | ​ | $ | (0.71) | ​ | $ | (0.45)
Diluted | ​ | $ | 0.67 | ​ | $ | (0.01) | ​ | $ | (0.71) | ​ | $ | (0.45)
Summary of Changes in Estimated Product Warranty Liabilities | Changes in our estimated product warranty liabilities were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended September 30,
​ |  | 2021 | ​ | 2020
Balance, beginning of period | ​ | $ | 769 | ​ | $ | 1,476
Utilization of reserve | ​ |  | (582) | ​ |  | (539)
Warranty expense (benefit) | ​ |  | 1,176 | ​ |  | (192)
Balance, end of period | ​ | $ | 1,363 | ​ | $ | 745

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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