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Note 2 - Significant Accounting Policies - Schedule of Changes in Contract Assets and Liabilities (Details)
 3 Months Ended
Dec. 31, 2021
USD ($)
Balance $ 1,275,988
Amounts reclassified to accounts receivable (253,582)
Other (25,797)
Balance 996,609 [1]
Balance 1,758,710
Amounts billed but not recognized as revenue 959,821
Revenue recognized related to the opening balance of deferred revenue (1,060,672)
Other
Balance $ 1,657,859
[1] Contract asset balances for September 30, 2021 include a current and a long-term contract asset of $984,155 and $291,833, respectively.