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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Income Statement [Abstract]    
Net sales $ 5,412 $ 4,097
Cost of sales 3,804 3,039
Gross profit 1,608 1,058
Operating expenses:    
Selling expenses 162 214
General and administrative expenses 564 534
Impairment of intangible assets 113
Research and development costs 476 429
Total operating expenses 1,315 1,177
Operating income (loss) 293 (119)
Other income (expense):    
Interest and miscellaneous income 3
Interest expense (3) (6)
Total other income (expense) (6)
Income (loss) before income taxes 293 (125)
Provision for income taxes 7
Net income (loss) $ 286 $ (125)
Basic and diluted income (loss) per share:    
Net income (loss) (in dollars per share) $ 0.07 $ (0.03)
Weighted average common shares outstanding:    
Basic (in shares) 4,062,475 4,140,751
Diluted (in shares) 4,103,459 4,140,751
Common shares outstanding (in shares) 4,063,837 4,141,504