XML 65 R53.htm IDEA: XBRL DOCUMENT v3.21.2
Accounts Receivable (Details) - Schedule of movements of allowance for doubtful accounts - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Schedule of movements of allowance for doubtful accounts [Abstract]    
Beginning balance
Addition 507
Ending balance $ 507