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
Dec. 31, 2017
Income Taxes      
Operating Loss Carryforwards, Expiration Period 2039    
Operating Loss Carryforwards $ 638    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 2,618 $ (416)  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%  
Domestic Tax Authority [Member]      
Income Taxes      
Operating Loss Carryforwards $ 59,013   $ 46,055
Tax Credit Carryforward, Amount 2,171    
Foreign Tax Authority [Member]      
Income Taxes      
Operating Loss Carryforwards 1,565    
Tax Credit Carryforward, Amount 25    
State and Local Jurisdiction [Member]      
Income Taxes      
Operating Loss Carryforwards 41,088    
Tax Credit Carryforward, Amount $ 504    
Research Tax Credit Carryforward [Member]      
Income Taxes      
Operating Loss Carryforwards, Expiration Period 2039