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Note 3 - Receivables - Schedule of Receivables (Details) - USD ($)
Jun. 30, 2022
Jun. 30, 2021
Accounts receivable $ 3,371,293 $ 5,375,598
Allowance for doubtful accounts (206,093) (234,963)
Accounts Receivable, after Allowance for Credit Loss, Noncurrent, Total $ 3,165,200 $ 5,140,635