Note 12 - Income Taxes - Reconciliation of Income Tax Rate (Details)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Federal statutory rate	21.00%	21.00%
State and local taxes, net of federal benefit	4.20%	2.90%
Foreign operations	(0.50%)	0.60%
Federal tax credits	(1.10%)	(1.00%)
Officer's Compensation	1.90%	1.00%
Uncertain tax position activity	0.50%	0.00%
Stock-based compensation	(2.30%)	(1.20%)
Tax rate changes	0.00%	(0.20%)
Other	0.80%	(0.40%)
Effective tax rate	24.50%	22.70%