Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.20.4
Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2019
Operating Loss Carryforwards [Line Items]        
Change in valuation allowance $ 6,585 $ 6,056 $ 5,519  
Operating loss carryforwards 42,317      
Accumulated deficit (203,647) (179,861)    
Deferred tax liability 4,004 809 0  
Lease liability 5,551 837 0  
Income tax expense (benefit) $ 0 $ 0 $ 0  
ASU 2016-02        
Operating Loss Carryforwards [Line Items]        
Accumulated deficit       $ 0
Deferred tax liability       951
Lease liability       $ 961