Note 9 - Bank Debt - Debt Proceeds Received and Principal Repayments Made (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Proceeds from Issuance of Debt	$ 2,327,119	$ 0	$ 2,327,119	$ 0	$ 0	$ 3,000,000
Repayments of Bank Debt	2,650,175	368,249	3,411,719	1,094,106	1,468,338	1,185,774
Debt Instrument, Debt Financing One [Member]
Proceeds from Issuance of Debt	0	0	0	0	0	0
Repayments of Bank Debt	59,798	57,671	178,865	172,017	230,763	223,222
Debt Instrument, Debt Financing Two [Member]
Proceeds from Issuance of Debt	0	0	0	0	0	0
Repayments of Bank Debt	133,203	128,534	396,276	382,324	512,139	494,455
Debt Instrument, Debt Financing Three [Member]
Proceeds from Issuance of Debt	0	0	0	0	0	0
Repayments of Bank Debt	25,405	24,173	75,278	71,629	96,104	91,446
Debt Instrument, Debt Financing Four [Member]
Proceeds from Issuance of Debt	0	0	0	0	0	0
Repayments of Bank Debt	55,453	53,505	165,007	159,171	213,227	205,884
Debt Instrument, Debt Financing Five [Member]
Proceeds from Issuance of Debt	0	0	0	0	0	0
Repayments of Bank Debt	17,571	16,719	52,066	49,542	66,470	32,017
Debt Instrument, Debt Financing Six [Member]
Proceeds from Issuance of Debt	0	0	0	0	0	2,000,000
Repayments of Bank Debt	1,547,119	59,191	1,671,553	174,804	235,393	93,054
Debt Instrument, Debt Financing Seven [Member]
Proceeds from Issuance of Debt	0	0	0	0	0	1,000,000
Repayments of Bank Debt	779,015	28,456	840,062	84,619	$ 114,242	$ 45,696
Debt Instrument, Debt Financing Eight [Member]
Proceeds from Issuance of Debt	2,327,119	0	2,327,119	0
Repayments of Bank Debt	$ 32,611	$ 0	$ 32,612	$ 0