XML 59 R44.htm IDEA: XBRL DOCUMENT v3.21.1
Note 4 - Accounts Receivable - Schedule of Receivables (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Allowance for doubtful accounts $ (328,522) $ (127,635)
Accounts receivable, net 4,041,563 4,190,543
Trade Accounts Receivable [Member]    
Accounts receivable, gross 3,537,864 3,346,215
Premium [Member]    
Accounts receivable, gross $ 832,221 $ 971,963