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Unsecured Notes Payable (Tables)
3 Months Ended
Sep. 30, 2020
Notes to Financial Statements  
Unsecured Notes Payable
   September 30, 2020  June 30, 2020
   (unaudited)          
Current debt:  (in thousands)
20% Unsecured note, bi-weekly principal and interest, due September 18, 2020 (1)  $—     $75 
20% Unsecured note, bi-weekly principal and interest, due February 19, 2021 (2)   134    214 
20% Unsecured note, interest only, due May 1, 2021 (3)   200    200 
20% Unsecured note, interest only, due July 31, 2021 (5)   100    —   
Total current debt   434    489 
 Long-term debt:          
20% Unsecured note, interest only, due October 31, 2021 (4)   100    100 
20% Unsecured note, interest only, due July 31, 2021 (5)   —      100 
Total long-term debt   100    200 
Total unsecured notes payable  $534   $689