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Commitments and Contingencies - Future minimum equipment lease payments (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Jun. 30, 2018
Commitments And Contingencies - Future Minimum Equipment Lease Payments    
2019 $ 104  
2020 129  
2021 75  
2022 33  
2023 17  
Future Minimum Lease Payments 358  
Less Amount Representing Interest (48)  
Present Value of Minimum Lease Payments 310  
Less Current Portion (112) $ (103)
Long-Term Obligations under Leases Payable $ 198 $ 178