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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