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Note 6 - Acquisition Related Intangible Assets, Net - Acquired Customer Relationships (Details) - Acquired Customer Relationships [Member] - USD ($)
Jun. 30, 2023
Jun. 30, 2022
Customer relationships $ 5,537,161 $ 5,537,161
Less accumulated amortization (5,274,361) (5,142,961)
Finite-Lived Intangible Assets, Net $ 262,800 $ 394,200