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
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Income Tax Contingency [Line Items]    
Valuation allowance   $ 48,100
Cumulative adjusted pre-tax book loss $ (75,443) (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
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