Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.20.4
Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax [Line Items]    
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 6.45% 4.74%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent 27.45% 24.74%
Valuation Allowance, Deferred Tax Asset, Change in Amount $ (3,929) $ (3,095)
Deferred Tax Assets, Valuation Allowance 17,287 $ 12,872
Operating Loss Carryforwards 43,300  
Operating Loss Carryforwards Expire Date   2037
Income Tax Expense (Benefit) 0 $ 0
Tax Year 2018 [Member]    
Income Tax [Line Items]    
Operating Loss Carryforwards 188,600  
Limitation on Operating loss carryforwards 155,600  
Tax Year 2019 [Member]    
Income Tax [Line Items]    
Operating Loss Carryforwards 33,000  
Tax Year 2020 [Member]    
Income Tax [Line Items]    
Operating Loss Carryforwards $ 10,300  
Scenario, Plan [Member]    
Income Tax [Line Items]    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%