Note 11 - Stock-based Compensation - Restricted Stock Activity (Details) - Restricted Stock [Member]	6 Months Ended
	Dec. 31, 2022 $ / shares shares
Outstanding (in shares) | shares	75,873
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 39.00
Granted (in shares) | shares	0
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0
Vested (in shares) | shares	0
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0
Canceled or expired (in shares) | shares	(55)
Canceled or expired (in dollars per share) | $ / shares	$ 60.60
Outstanding (in shares) | shares	75,818
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 38.93