Note 8 - Leases - Operating Lease Balance Sheet Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Total lease cost	$ 14,553	$ 63,973
Operating lease right-of-use assets	23,220		$ 36,905
Operating lease liabilities, current portion	23,797		37,829
Operating lease liabilities, non-current portion	0		$ 0
Total operating lease liabilities	$ 23,797
Weighted average remaining lease term (in years) – operating leases (Year)	5 months 1 day		8 months 1 day
Weighted average discount rate – operating leases	5.50%		5.50%
Cash paid for amounts included in the measurement of operating lease liabilities for the three months ended March 31, 2024 and 2023:	$ 22,613		$ 69,821
2024 (5 months remaining)	24,255
2025	0
Total future lease payments	24,255
Less: imputed interest	(458)
Total	23,797
Approximation [Member]
Operating lease right-of-use assets	23,220		36,905
Total operating lease liabilities	23,797		37,829
Total	$ 23,797		$ 37,829