Annual report pursuant to Section 13 and 15(d)

SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable and Accounts Payable (Details)

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SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable and Accounts Payable (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
SIGNIFICANT ACCOUNTING POLICIES    
Allowance for uncollectible accounts receivable $ 12,149 $ 10,209