Note 8 - Leases - Lease Costs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Operating lease cost	$ 142,321	$ 152,338
Variable lease cost	19,504	29,576
Operating lease expense	161,825	181,914
Short-term lease rent expense	317,792	337,584
Total rent expense	479,617	519,498
Operating cash flows - operating leases	128,426	126,434
Right-of-use assets obtained in exchange for operating lease liabilities	$ 0	$ 344,382
Weighted-average remaining lease term – operating leases (in years) (Year)	2 years 6 months	3 years
Weighted-average discount rate – operating leases	7.50%	6.71%