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Goodwill and Other Intangible Assets (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 27, 2015
Apr. 02, 2016
Changes in goodwill    
Balance at the beginning of the period   $ 5,600,000
Currency translation and other adjustments   (100,000)
Balance at the end of the period $ 5,600,000 5,500,000
Impairment charges 0  
Commercial Lasers    
Changes in goodwill    
Balance at the beginning of the period   5,600,000
Currency translation and other adjustments   (100,000)
Balance at the end of the period $ 5,600,000 $ 5,500,000