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Commitments and Contingencies - Future minimum equipment lease payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jun. 30, 2019
Commitments And Contingencies - Future Minimum Equipment Lease Payments    
2020 $ 76  
2021 104  
2022 62  
2023 40  
2024 23  
Future Minimum Lease Payments 305  
Less Amount Representing Interest (44)  
Present Value of Minimum Lease Payments 261  
Less Current Portion (110) $ (127)
Long-Term Obligations under Leases Payable $ 151 $ 199