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Supplemental Financial Information (Details - Severance of Related Charges) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Severance payable, beginning balance $ 88  
Charges 542 $ 92
Payments (233)  
Severance payable, ending balance $ 397