Note 8 - Noncontrolling Interest - Clyra Medical - Warrants Outstanding (Details) - $ / shares	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Warrants outstanding, balance (in shares)	31,615,616	51,590,300
Warrants outstanding, balance (in shares)	28,980,918	31,904,779
Weighted average remaining life, balance (Year)	1 year 9 months 18 days
Clyra Medical [Member]
Warrants outstanding, balance (in shares)	1,183,182	749,911
Granted warrants, balance (in shares)	747,991	146,083
Exercised warrants, balance (in shares)	(241,073)
Warrants outstanding, balance (in shares)	1,690,100	895,994
Weighted average remaining life, balance (Year)	1 year 9 months 18 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)	7.15	7.5
Exercised warrants, weighted average price per share (in dollars per share)	6.55
Outstanding Warrants, Weighted Average Price Per Share (in dollars per share)	$ 5.38	$ 4.03