Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net Sales	$ 15,632	$ 21,397	$ 58,627	$ 61,099
Cost of Sales	10,485	13,475	37,338	38,120
Gross Profit	5,147	7,922	21,289	22,979
Operating Expenses
Selling, general and administrative	4,415	4,700	13,992	13,621
Engineering, research and development	1,812	2,132	6,090	5,662
Severance, impairment and other charges	0	(3)	(609)	603
Total operating expenses	6,227	6,829	19,473	19,886
Operating (Loss) Income	(1,080)	1,093	1,816	3,093
Other Income and (Expenses)
Interest expense, net	(16)	(53)	(72)	(137)
Foreign currency (loss) gain, net	(127)	63	(178)	(16)
Other income, net	28	24	33	49
Total other (expense) and income	(115)	34	(217)	(104)
(Loss) Income Before Income Taxes	(1,195)	1,127	1,599	2,989
Income Tax Benefit (Expense)	130	(107)	(225)	(45)
Net (Loss) Income	$ (1,065)	$ 1,020	$ 1,374	$ 2,944
(Loss) Income Per Common Share
Basic	$ (0.11)	$ 0.11	$ 0.14	$ 0.31
Diluted	$ (0.11)	$ 0.11	$ 0.14	$ 0.31
Weighted Average Common Shares Outstanding
Basic	9,627	9,539	9,601	9,468
Dilutive effect of stock options	0	152	110	74
Diluted	9,627	9,691	9,711	9,542