Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.21.1
Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Examination [Line Items]    
Loss before taxes $ 22,197 $ 12,866
Net loss 22,199 12,871
Net operating loss carryforwards federal 126,303  
Net operating loss carryforwards state 60,929  
Federal net operating losses subject to expiration 85,674  
Federal net operating losses not subject to expiration 40,629  
R&D credit carryforwards federal 1,482  
R&D credit carryforwards state 1,145  
Valuation allowance 35,100 31,349
United States    
Income Tax Examination [Line Items]    
Net loss $ 22,194 $ 12,766