Overview and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2021 |
Jun. 30, 2020 |
Dec. 31, 2020 |
Jul. 10, 2020 |
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| Net income (loss) | $ (15,256) | $ (24,825) | $ (34,708) | $ (261,166) | ||
| Accumulated deficit | (758,850) | (758,850) | $ (724,142) | |||
| Debt instrument debt default amount | 97,500 | 97,500 | ||||
| Debt instrument debt default principal amount | 60,000 | 60,000 | ||||
| Debt instrument debt default accrued additional fees and interest | 14,600 | 14,600 | ||||
| Revenue [Member] | ||||||
| Increase in cost and expenses | 2,900 | |||||
| Recapitalization transaction [Member] | ||||||
| Debt instrument face amount | $ 14,700 | |||||
| Secured Debt [Member] | ||||||
| Debt Instrument debt default accrued interest amount | 22,900 | 22,900 | ||||
| Unsecured Debt [Member] | ||||||
| Debt Instrument debt default accrued interest amount | $ 7,200 | $ 7,200 | ||||
| Senior secured convertible debentures [Member] | ||||||
| Debt instrument interest rate | 13.00% | |||||
| Convertible unsecured debentures [Member] | ||||||
| Debt instrument interest rate | 8.00% | |||||
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- Definition Debt instrument debt default accrued additional fees and interest. No definition available.
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- Definition Debt instrument debt default accrued interest amount. No definition available.
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- Definition Debt instrument debt default principal amount. No definition available.
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- Definition Increase decrease in cost and expenses. No definition available.
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- Definition Amount of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The average effective interest rate during the reporting period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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