Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Consolidated Statements Of Operations [Abstract]
Net Sales	$ 21,397	$ 16,325	$ 61,099	$ 55,596
Cost of Sales	13,475	11,135	38,120	36,388
Gross Profit	7,922	5,190	22,979	19,208
Operating Expenses
Selling, general and administrative	4,700	4,039	13,621	12,795
Engineering, research and development	2,132	1,650	5,662	4,917
Severance, impairment and other charges	(3)	3	603	720
Total operating expenses	6,829	5,692	19,886	18,432
Operating Income (Loss)	1,093	(502)	3,093	776
Other Income and (Expenses)
Interest expense, net	(53)	(94)	(137)	(212)
Foreign currency gain (loss), net	63	118	(16)	(226)
Other income (expenses), net	24	4	49	28
Total other income and (expenses)	34	28	(104)	(410)
Income (Loss) Before Income Taxes	1,127	(474)	2,989	366
Income Tax Expense	(107)	(124)	(45)	(795)
Net Income (Loss)	$ 1,020	$ (598)	$ 2,944	$ (429)
Income (Loss) Per Common Share
Basic	$ 0.11	$ (0.06)	$ 0.31	$ (0.05)
Diluted	$ 0.11	$ (0.06)	$ 0.31	$ (0.05)
Weighted Average Common Shares Outstanding
Basic	9,539	9,400	9,468	9,384
Dilutive effect of stock options	152		74
Diluted	9,691	9,400	9,542	9,384