Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.19.3.a.u2
Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Tax [Line Items]    
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 4.74% 4.74%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent 25.74% 25.74%
Valuation Allowance, Deferred Tax Asset, Change in Amount $ (3,095) $ (4,217)
Deferred Tax Assets, Valuation Allowance 52,910 $ 49,815
Operating Loss Carryforwards 188,600  
Operating Loss Carryforwards Expire Date   2037
Income Tax Expense (Benefit) $ 0 $ 0
Scenario, Plan [Member]    
Income Tax [Line Items]    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%