Annual report pursuant to Section 13 and 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 ($)
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Inputs, Level 1 [Member]    
Total $ 940,773 $ 1,706,376
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Money market funds 940,773 1,706,376
Fair Value, Inputs, Level 2 [Member]    
Total
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]    
Money market funds
Fair Value, Inputs, Level 3 [Member]    
Total
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]    
Money market funds