Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.21.2
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 10, 2021
Sep. 30, 2021
Dec. 31, 2020
Income Tax Contingency [Line Items]      
Valuation allowance     $ 48,100
Cumulative adjusted pre-tax book loss   $ (53,349) (78,023)
Deferred tax assets operating loss carry forwards domestic     28,400
Deferred tax assets, operating loss carryforwards, state and local     15,700
Deferred tax assets other financial statement accrual assets     4,000
2024 Notes [member]      
Income Tax Contingency [Line Items]      
Debt instrument, face amount $ 112,800 112,800  
Debt Conversion, Converted Instrument, Amount 112,800 112,800  
2028 Notes [member]      
Income Tax Contingency [Line Items]      
Debt Conversion, Converted Instrument, Amount $ 114,700 114,700  
Revision of Prior Period, Adjustment [Member]      
Income Tax Contingency [Line Items]      
Deferred tax assets, valuation allowance provided   $ 35,100  
Cumulative Effect, Period of Adoption, Adjustment [Member] | Revision of Prior Period, Adjustment [Member]      
Income Tax Contingency [Line Items]      
Cumulative adjusted pre-tax book loss     35,100
Domestic Tax Authority [Member]      
Income Tax Contingency [Line Items]      
Valuation allowance     28,400
Net operating loss carryforwards for federal income tax purpose     $ 135,300
Beginning year of expiry for net operating loss carry forwards     2021
Ending year of expiry for net operating loss carryforwards     2038
State and Local Jurisdiction [Member]      
Income Tax Contingency [Line Items]      
Valuation allowance     $ 19,700
Net operating loss carryforwards for federal income tax purpose     $ 610,800
Beginning year of expiry for net operating loss carry forwards     2021
Ending year of expiry for net operating loss carryforwards     2040