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Significant Accounting Policies - Allowance For Doubtful Accounts (Details) - Allowance for doubtful accounts, current - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Allowance for doubtful accounts    
Balance, beginning of year $ 1,636 $ 3,465
Provision for bad debts 1,032 (1,032)
Write-offs (1,064) (797)
Balance, end of year $ 1,604 $ 1,636