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Note 3 - Revenue from Contracts with Customers - Accounts Receivable (Details) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Accounts receivable | $ 1,633,972 | $ 1,629,559
Billed Revenues [Member] | Government Sector [Member] |  |
Accounts receivable | 1,578,443 | 1,573,407
Billed Revenues [Member] | Commercial and Industrial Sector [Member] |  |
Accounts receivable | 55,529 | 56,152
Unbilled Revenues [Member] |  |
Accounts receivable | $ 0 | $ 0

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