Note 23 - Stock Options - Summary of Nonvested Employee Stock (Details) - Employee Stock Option Plan 2017 [Member] - $ / shares	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Non-vested options outstanding, beginning (in shares)	102,250	98,000
Non-vested, weighted average grant date fair value (in dollars per share)	$ 2.29	$ 1.79
Granted (in shares)	40,500	71,000
Granted, weighted average grant date fair value (in dollars per share)	$ 3.69	$ 1.88
Vested (in shares)	(66,875)	(66,750)
Vested, weighted average grant date fair value (in dollars per share)	$ 0	$ 1.83
Non-vested options outstanding, beginning (in shares)	75,875	102,250
Non-vested, weighted average grant date fair value (in dollars per share)	$ 5.98	$ 2.29