Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.20.1
Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Deferred Tax Assets, Valuation Allowance $ 24,864 $ 13,339
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%
Research Tax Credit Carryforward [Member]    
Tax Credit Carryforward, Amount $ 2,600  
Domestic Tax Authority [Member]    
Operating Loss Carryforwards $ 60,300  
Operating Loss Carry forward, Expire Period 2035  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards $ 111,900  
Operating Loss Carry forward, Expire Period 2035