Note 8 - Noncontrolling Interest - Clyra Medical - Common Shares Outstanding (Details) - Clyra Medical [Member] - $ / shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Clyra options outstanding, balance (in shares)	1,478,922	1,583,329
Weighted average price, balance (in dollars per share)	$ 0.31	$ 0.06
Options outstanding, Granted (in shares)	72,610	85,815
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)	$ 4.18	$ 1.46
Vested Balance (in shares)	1,551,532	1,372,755
Vested Balance, Weighted Average Exercise Price (in dollars per share)	$ 1.2	$ 0.98
Weighted average remaining term, Outstanding (Year)	6 years 4 months 24 days	6 years 1 month 6 days
Options Outstanding, Exercised (in shares)		(296,389)
Weighted average exercise price, Exercised (in dollars per share)		$ 1