Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Consolidated Statements Of Operations [Abstract]
Net Sales	$ 77,947	$ 69,135	$ 74,405
Cost of Sales	50,178	47,996	46,134
Gross Profit	27,769	21,139	28,271
Operating Expenses
Selling, general and administrative	17,347	20,316	20,397
Engineering, research and development	6,826	7,381	7,911
Severance, impairment and other charges	1,777	2,826
Total operating expenses	25,950	30,523	28,308
Operating Income (Loss)	1,819	(9,384)	(37)
Other Income and (Expenses)
Interest income (expense), net	(264)	(148)	138
Foreign currency income (loss), net	(333)	144	(1,186)
Other income and (expense), net	40	171	250
Total other income (expense)	(557)	167	(798)
Income (Loss) Before Income Taxes	1,262	(9,217)	(835)
Income Tax (Expense) Benefit	(1,430)	(12,896)	374
Net Loss	$ (168)	$ (22,113)	$ (461)
Net Loss Per Common Share - Basic	$ (0.02)	$ (2.36)	$ (0.05)
Net Loss Per Common Share - Diluted	$ (0.02)	$ (2.36)	$ (0.05)
Weighted Average Common Shares Outstanding
Basic	9,382	9,360	9,252
Dilutive effect of stock options
Diluted	9,382	9,360	9,252