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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]  
Summary of Accounts Receivable
   September 30,
2018		  June 30,
2018
   (in thousands)
Accounts receivable  $610   $687 
Allowance for doubtful accounts   (24)   (24)
Allowance for discounts and returns   (6)   (6)
Total accounts receivable, net  $580   $657