Note 10 - Other Income and (Expense) - Summary of Other Income and Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Interest income	$ 71	$ 128	$ 399
Interest expense	(976)	(845)	(674)
Foreign currency gain (loss), net	(426)	(316)	(86)
(Loss) from equity investment			(307)
Brazil tax settlements	345	1,446
Patent lawsuit settlement		(666)	(100)
Sale of scrap material	110	70	71
Other income (expense), net	195	324	190
	(1,611)	(653)	(1,404)
Pension [Member]
Pension net periodic benefit cost (NPBC)	$ (930)	$ (794)	$ (897)