Annual report pursuant to Section 13 and 15(d)

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

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Note 6 - Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Fair value of contingent consideration $ 0 $ 930,000
Money Market Funds [Member]    
Money market funds 58,242 1,660,663
Fair Value, Inputs, Level 1 [Member]    
Fair value of contingent consideration 0 0
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Money market funds 58,242 1,600,663
Fair Value, Inputs, Level 2 [Member]    
Fair value of contingent consideration 0 0
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]    
Money market funds 0 0
Fair Value, Inputs, Level 3 [Member]    
Fair value of contingent consideration 0 930,000
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]    
Money market funds $ 0 $ 0