Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis (Details)

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Note 4 - Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]      
Money market funds $ 51,413   $ 1,600,663
Fair Value, Inputs, Level 3 [Member]      
Fair value of contingent consideration 0   930,000
December 31, 2021 0 $ 942,609 930,000
Change in fair value (942,609) $ 12,609  
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]      
Money market funds $ 51,413   $ 1,660,663