Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)

v3.20.4
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 57,165,377 $ 10,614,722 $ 13,310,616
Impairment Charges 0 0  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options     49,425
Cash, Uninsured Amount 56,700,000    
Lessee, Operating Lease, Liability, Payments, Due $ 488,000    
Minimum [Member]      
Property, Plant and Equipment, Useful Life 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 7 months    
Maximum [Member]      
Property, Plant and Equipment, Useful Life 10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 3 years    
Lessee, Operating Lease, Liability, Payments, Due $ 100,000 $ 100,000  
Leasehold Improvements [Member]      
Property, Plant and Equipment, Useful Life 64 months