Note 8 - Noncontrolling Interest - Clyra Medical - Common Shares Outstanding (Details) - Clyra Medical [Member]	9 Months Ended
	Sep. 30, 2025 $ / shares shares	Sep. 30, 2024 $ / shares shares
Options outstanding, balance (in shares) | shares	1,976,863	1,478,922
Weighted average exercise price, balance (in dollars per share) | $ / shares	$ 1	$ 0.31
Options outstanding, Granted (in shares) | shares	103,774	72,610
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 4.5	$ 4.18
Options outstanding, balance (in shares) | shares	2,080,637	1,551,532
Weighted average exercise price, balance (in dollars per share) | $ / shares	$ 1.17	$ 1.2
Weighted average remaining term, balance (Year)	6 years 3 months 18 days
Clyra options outstanding, Unvested (in shares) | shares	176,667
Weighted average price, Unvested (in dollars per share) | $ / shares	$ 0.69
Options outstanding, Vested (in shares) | shares	2,257,304
Weighted average exercise price, Vested (in dollars per share) | $ / shares	$ 1.22
Weighted average remaining term, balance (Year)	6 years