Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Percent, Total	14.20%	15.40%
Unrecognized Tax Benefits, Ending Balance	$ 0	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	0	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0	$ 0
Open Tax Year	2016 2017 2018 2019