Note 7 - Stockholders' Equity (Deficit) - Option Activity (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Outstanding (in shares)	56	2,505	2,505
Outstanding, weighted average exercise price (in dollars per share)	$ 5,342	$ 2,000	$ 2,000
Outstanding, weighted average fair value	$ 2,874	$ 1,080	$ 1,080
Outstanding, weighted average remaining contractual term (Year)		1 year 9 months 10 days	1 year 2 months 23 days	1 year 5 months 26 days
Granted (in shares)	0	0
Granted, weighted average exercise price (in dollars per share)	$ 0	$ 0
Exercised (in shares)	0	0
Exercised, weighted average exercise price (in dollars per share)	$ 0	$ 0
Expired/Forfeited (in shares)	(56)	(2,450)
Expired/Forfeited, weighted average exercise price (in dollars per share)	$ 5,342	$ 1,956
Expired/Forfeited, weighted average fair value	$ 2,874	$ 1,062
Outstanding (in shares)	0	55	56	2,505
Outstanding, weighted average exercise price (in dollars per share)	$ 0	$ 5,298	$ 5,342	$ 2,000
Outstanding, weighted average fair value	$ 0	$ 2,851	$ 2,874	$ 1,080
Exercisable (in shares)	0	55
Exercisable, weighted average exercise price (in dollars per share)	$ 0	$ 5,298
Exercisable, weighted average fair value	$ 0	$ 2,851
Outstanding, aggregate intrinsic value				$ 2,294
Exercisable, weighted average remaining contractual term (Year)		1 year 9 months 10 days