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
Income Tax Disclosure [Line Items]    
Increase in valuation allowance $ 5,611  
Deferred tax assets operating loss carryforwards federal 17,480  
Deferred tax assets operating loss carryforwards state 19,220  
Deferred tax assets operating loss carryforwards local 10,129  
Deferred tax assets, operating loss carryforwards, not subject to expiration 17,231  
Deferred tax assets, operating loss carryforwards, subject to expiration $ 249  
Operating loss carryforwards federal commencement of expiration date 2037  
Operating loss carryforwards state commencement of expiration date 2037  
Operating loss carryforwards local commencement of expiration date 2039  
Research and development tax credits $ 452 $ 69
Open tax year 2017 2018  
Percentage of eligible tax positions for recognition 50.00%  
Federal    
Income Tax Disclosure [Line Items]    
Research and development tax credits $ 452  
Deferred tax assets tax credit carryforwards commencement of expiration date 2038