Note 11 - Stock-based Compensation - Stock Options Outstanding (Details)	6 Months Ended
	Dec. 31, 2024 $ / shares shares
Outstanding, exercise prices range lower limit (in dollars per share)	$ 6.99
Outstanding, exercise prices range upper (in dollars per share)	$ 175.5
Number outstanding (in shares) | shares	220,349
Options Outstanding, Weighted average remaining contractual life (Year)	8 years 9 months 10 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 13.24
Shares Exercisable (in shares) | shares	58,403
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 19.57
Exercise Price Range 1 [Member]
Outstanding, exercise prices range lower limit (in dollars per share)	6.99
Outstanding, exercise prices range upper (in dollars per share)	$ 19.2
Number outstanding (in shares) | shares	217,724
Options Outstanding, Weighted average remaining contractual life (Year)	8 years 10 months 6 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 11.57
Shares Exercisable (in shares) | shares	55,778
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 13.34
Exercise Price Range 2 [Member]
Outstanding, exercise prices range lower limit (in dollars per share)	55.5
Outstanding, exercise prices range upper (in dollars per share)	$ 84.9
Number outstanding (in shares) | shares	418
Options Outstanding, Weighted average remaining contractual life (Year)	3 years 10 months 9 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 61.52
Shares Exercisable (in shares) | shares	418
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 61.52
Exercise Price Range 3 [Member]
Outstanding, exercise prices range lower limit (in dollars per share)	159
Outstanding, exercise prices range upper (in dollars per share)	$ 175.5
Number outstanding (in shares) | shares	2,207
Options Outstanding, Weighted average remaining contractual life (Year)	2 years 4 months 6 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 168.97
Shares Exercisable (in shares) | shares	2,207
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 168.97