Quarterly report pursuant to Section 13 or 15(d)

SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details)

v3.21.2
SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Disaggregation of Revenue [Line Items]        
Revenue recognized $ 0   $ 1,300,338  
Contract liabilities   $ 15,000,000   $ 15,000,000
Minimum        
Disaggregation of Revenue [Line Items]        
Invoice payment terms   45 days    
Maximum        
Disaggregation of Revenue [Line Items]        
Invoice payment terms   90 days