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

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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