Note 2 - Fair Value of Financial Instruments - Financial Instruments (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Reported Value Measurement [Member]
Total	$ 9,393,491	$ 9,071,862
Estimate of Fair Value Measurement [Member]
Total	9,366,045	9,046,364
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Cash and Cash Equivalents Excluding Certificates of Deposit [Member]
Cash and cash equivalents, fair value	7,866,811	7,546,689
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Certificates of Deposit [Member]
Cash and cash equivalents, fair value	1,526,680	1,525,173
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Cash and Cash Equivalents Excluding Certificates of Deposit [Member]
Cash and cash equivalents, fair value	7,866,811	7,546,689
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Certificates of Deposit [Member]
Cash and cash equivalents, fair value	$ 1,499,234	$ 1,499,675