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4. Bank Line of Credit (Tables)
9 Months Ended
Mar. 31, 2017
Debt Disclosure [Abstract]  
Schedule of Minimum Tangible Net Worth
   March 31, 
   2017 
   (In thousands) 
Minimum TNW  $6,021 
Actual TNW  $10,806 
Availability under the Line of Credit
   March 31,   June 30, 
   2017   2016 
   (In thousands) 
Outstanding borrowings on the line of credit  $   $ 
Available borrowing capacity  $2,778   $2,620 
Outstanding letters of credit  $51   $51