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Note 2 - Cash, Cash Equivalents, and Investments - Major Security Type (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Cash and cash equivalent, fair value $ 6,515,028 $ 5,794,272
Cash, adjusted cost 25,775 26,782
Money Market Funds, adjusted cost 6,489,253 5,767,490
Cash and cash equivalents 6,515,028 5,794,272
Corporate Bonds, gross unrealized holding gains 0 0
Corporate Bonds, gross unrealized holding losses (185) (47,208)
Short-term investment securities 748,290 6,847,270
Total, fair value 7,263,133 12,594,334
Total, adjusted cost 7,263,318 12,641,542
Cash [Member]    
Cash and cash equivalent, fair value 25,775 26,782
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalent, fair value 6,489,253 5,767,490
Short-term Corporate Bonds [Member]    
Short-term investment securities [1],[2] 748,290 6,847,270
Short-term Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member]    
Corporate Bonds, fair value [1],[2] 748,105 6,800,062
Corporate Bonds, gross unrealized holding gains [1],[2] 0 0
Corporate Bonds, gross unrealized holding losses [1],[2] $ (185) $ (47,208)
[1] For the years ended December 31, 2023 and 2022, the Company received discounts of $39,012 and $6,280 to purchase held-to-maturity investment securities, respectively.
[2] Short-term investment securities will mature within 12 months or less, from the applicable reporting date.