Note 8 - Noncontrolling Interest - Clyra Medical - Warrants Outstanding (Details) - $ / shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Warrants outstanding, balance (in shares)	31,244,078	31,615,616
Warrants outstanding, balance (in shares)	32,217,910	31,299,312
Weighted average remaining life, balance (Year)	1 year 6 months
Clyra Medical [Member]
Warrants outstanding, balance (in shares)	1,702,496	1,183,182
Granted warrants, balance (in shares)	159,668	125,917
Expired warrants, balance (in shares)	(40,323)
Expired Warrants, Weighted Average Price Per Share (in dollars per share)	$ 3.72
Warrants outstanding, balance (in shares)	1,821,841	1,309,099
Weighted average remaining life, balance (Year)	1 year 8 months 12 days
Clyra Medical [Member] \| Minimum [Member]
Outstanding Warrants, Weighted Average Price Per Share (in dollars per share)	$ 5.39	$ 4.84
Granted Warrants, Weighted Average Price Per Share (in dollars per share)	7.5	6.4
Outstanding Warrants, Weighted Average Price Per Share (in dollars per share)	$ 5.61	$ 4.99