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Leases - Right of use assets and lease liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Oct. 01, 2019 | Sep. 30, 2019
--- | --- | --- | ---
Assets: |  |  |
Operating leases | $ 2,180 | $ 2,448 |
Lease receivable - current | 416 | 367 | $ 367
Lease receivable - noncurrent | 103 | 417 | $ 417
Total lease receivable | 519 | 784 |
Liabilities |  |  |
Current operating lease liabilities | $ 678 | 746 |
Current operating lease liabilities, Statement of Financial Position | us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent |  |
Non-current operating lease liabilities | $ 1,562 | 1,783 |
Total operating lease liabilities | 2,240 | 2,529 |
Current finance lease liabilities | $ 348 | 334 |
Current finance lease liabilities, Statement of Financial Position | us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent |  |
Non-current finance lease liabilities | $ 63 | 324 |
Non-current finance lease liabilities, Statement of Financial Position | us-gaap:OtherLiabilitiesNoncurrent |  |
Total finance lease liabilities | $ 411 | $ 658 |

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