Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net Sales	$ 76,822	$ 84,693	$ 77,947
Cost of Sales	49,630	52,693	50,178
Gross Profit	27,192	32,000	27,769
Operating Expenses
Selling, general and administrative	18,980	18,469
Engineering, research and development	8,040	7,980
Severance, impairment and other charges	6,930	603
Total operating expenses	33,950	27,052	25,950
Operating (Loss) Income	(6,758)	4,948	1,819
Other Income and (Expense)
Interest expense, net	(252)	(181)
Foreign currency loss, net	(90)	(397)
Other income (expense), net	97	119
Total other income and (expense)	(245)	(459)	(557)
(Loss) Income Before Income Taxes	(7,003)	4,489	1,262
Income Tax Benefit (Expense)	212	(516)	(1,177)
Net (Loss) Income	$ (6,791)	$ 3,973	$ 85
(Loss) Income Per Common Share
Basic	$ (0.71)	$ 0.42	$ 0.01
Diluted	$ (0.71)	$ 0.41	$ 0.01
Weighted Average Common Shares Outstanding
Basic	9,612	9,469	9,382
Dilutive effect of stock options	0	110
Diluted	9,612	9,579	9,382