Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Income Taxes    
Uncertain tax positions $ 0 $ 0
Uncertain tax positions, interest or penalties 0 $ 0
Revenue Recognition    
Accounts receivable from contracts with customers 299,849  
Unbilled receivables from contracts with customers 37,863  
Deferred revenue 1,352,221  
Performance guarantee liabilities $ 680,737  
Accounts receivable, payments term 30 days