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Note 1 - Organization and Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts receivable | $ 294,199 | $ 558,530
Billed Revenues [Member] |  |
Accounts receivable | 130,532 | 432,546
Unbilled Revenues [Member] |  |
Accounts receivable | $ 163,667 | $ 125,984

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