Note 8 - Noncontrolling Interest - Clyra Medical - Warrants Outstanding (Details) - $ / shares	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Warrants outstanding, balance (in shares)	31,615,616	51,590,300
Expired (in shares)		967,748
Warrants outstanding, balance (in shares)	29,727,446	49,187,314
Weighted average remaining life, balance (Year)	2 years
Clyra Medical [Member]
Warrants outstanding, balance (in shares)	1,183,182	749,911
Granted warrants, balance (in shares)	470,002	111,500
Expired (in shares)	(224,944)
Warrants outstanding, balance (in shares)	1,428,240	861,411
Weighted average remaining life, balance (Year)	1 year 10 months 24 days
Clyra Medical [Member] | Minimum [Member]
Outstanding Warrants, Weighted Average Price Per Share (in dollars per share)	$ 4.84	$ 3.74
Granted Warrants, Weighted Average Price Per Share (in dollars per share)	6.94	7.5
Expired (in dollars per share)	7.24
Outstanding Warrants, Weighted Average Price Per Share (in dollars per share)	$ 4.87	$ 3.96