Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.20.4
Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Line Items]    
Increase in valuation allowance $ 11,755,000  
Deferred tax assets operating loss carryforwards federal 45,550,000  
Deferred tax assets operating loss carryforwards state 47,735,000  
Deferred tax assets operating loss carryforwards local 38,645,000  
Deferred tax assets, operating loss carryforwards, not subject to expiration 45,301,000  
Deferred tax assets, operating loss carryforwards, subject to expiration $ 249,000  
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 $ 1,317,000 $ 452,000
Open tax year 2017 2018 2019  
Percentage of eligible tax positions for recognition 50.00%  
Unrecognized income tax benefits that would affect effective tax rate $ 0  
Federal    
Income Tax Disclosure [Line Items]    
Research and development tax credits $ 1,317,000  
Deferred tax assets tax credit carryforwards commencement of expiration date 2038