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Statements of Operations-Additional Information (Detail Textuals) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Statements Of Operations Additional Information [Line Items]    
Deferred revenue $ 7,414 $ 4,530
Current deferred revenue, included in accrued expense and other current liabilities $ 778 $ 508
Customer    
Statements Of Operations Additional Information [Line Items]    
Average worldwide collection period for accounts receivable 60 days  
Customer | Maximum    
Statements Of Operations Additional Information [Line Items]    
Payment term 120 days  
Customer | Minimum    
Statements Of Operations Additional Information [Line Items]    
Payment term 30 days