Annual report pursuant to Section 13 and 15(d)

Note 6 - Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis Based on Level 3 Inputs (Details)

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Note 6 - Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis Based on Level 3 Inputs (Details) - Contingent Consideration [Member] - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
December 31, 2020 $ 930,000 $ 0
Change in fair value (930,000) 930,000
Balance $ 0 $ 930,000