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3. Warranty Reserve (Tables)
6 Months Ended
Dec. 31, 2015
Standard Product Warranty Disclosure [Abstract]  
Warranty reserve
   Six Months Ended   Year Ended 
   December 31,   June 30, 
   2015   2015 
   (In thousands) 
Beginning balance  $163   $150 
Charged to cost of revenues   15    112 
Usage   (36)   (99)
Ending balance  $142   $163