Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.20.1
Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended 24 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]        
Federal statutory tax rate     35.00% 21.00%
U.S. statutory tax rate (0.80%) 0.30%    
Territorial tax system beginning in 2018 by dividend received   100.00%    
Valuation allowance of deferred tax assets, net $ 510 $ 10,795   $ 510
Amount of valuation allowance determined to release 10,300      
Tax year 2017        
Operating Loss Carryforwards [Line Items]        
U.S. statutory tax rate     10.50%  
Tax year 2025        
Operating Loss Carryforwards [Line Items]        
U.S. statutory tax rate     13.125%  
Federal income tax        
Operating Loss Carryforwards [Line Items]        
Operating loss $ 13,900     $ 13,900
Federal income tax | Minimum        
Operating Loss Carryforwards [Line Items]        
Operating loss, expiration date Dec. 31, 2035      
Federal income tax | Maximum        
Operating Loss Carryforwards [Line Items]        
Operating loss, expiration date Dec. 31, 2037      
State income tax | Minimum        
Operating Loss Carryforwards [Line Items]        
Operating loss, expiration date Dec. 31, 2035      
State income tax | Maximum        
Operating Loss Carryforwards [Line Items]        
Operating loss, expiration date Dec. 31, 2037