Note 8 - Noncontrolling Interest - Clyra Medical - Common Shares Outstanding (Details) - Clyra Medical [Member] - $ / shares	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Options outstanding, balance (in shares)	2,027,527	1,976,863	1,478,922	1,976,863	1,478,922
Weighted average exercise price, balance (in dollars per share)	$ 1.09	$ 1	$ 0.31	$ 1	$ 0.31
Options outstanding, Granted (in shares)		50,664	50,055
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)		$ 4.5	$ 4.03
Unvested (in shares)	(200,000)			(200,000)	(3,075)
Weighted average price, Unvested (in dollars per share)	$ 0.01			$ 0.01	$ 2.71
Options outstanding, Vested (in shares)	1,827,527			1,827,527	1,525,902
Weighted average exercise price, Vested (in dollars per share)	$ 1.21			$ 1.21	$ 0.43
Options outstanding, balance (in shares)		2,027,527	1,528,977
Weighted average exercise price, balance (in dollars per share)		$ 1.09	$ 0.43
Weighted average remaining term, balance (Year)		6 years 4 months 24 days
Weighted average remaining term, vested (Year)				6 years 2 months 12 days