Annual report pursuant to Section 13 and 15(d)

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

v3.21.1
SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable and Accounts Payable (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
SIGNIFICANT ACCOUNTING POLICIES    
Allowance for uncollectible accounts receivable $ 10,209 $ 34,115