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Selected Consolidated Financial Statement Information (Accounts Receivable, Net) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Quarterly Financial Information Disclosure [Abstract]    
Accounts receivable $ 32,025 $ 29,336
Less: Allowance for doubtful accounts (800) (864)
Accounts receivable, net $ 31,225 $ 28,472