Note S - Derivative Financial Instruments (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance	$ 139,958	$ 182,818	$ 143,616
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (392)
Foreign Exchange Forward [Member]
Derivative, Number of Instruments Held, Total	1	0
Derivative, Notional Amount	$ 1,247
Derivative, Average Remaining Maturity (Day)	7 days
Derivative, Loss on Derivative	$ 9
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance	$ (1,104)	$ (509)