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Supplementary Balance Sheet Information - Accounts Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Jun. 30, 2015
Accounts Receivable    
Account receivable, Gross $ 23,918 $ 32,357
Account receivable, Allowance 2,169 1,636
Account receivable, Net $ 21,749 $ 30,721