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LEASES - Right-of-use lease assets and lease liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Sep. 30, 2019
--- | --- | ---
Right-of-use lease assets and lease liabilities |  |
Operating lease right-of use-assets, net | $ 4,739 | $ 0
Current portion of operating lease liabilities | 864 | 0
Long-term operating lease liabilities | 4,044 | 0
Total operating lease liabilities | 4,908 |
Finance right-of-use assets, net | 4,641 | 0
Current portion of finance lease liabilities | 4,616 | 18
Long-term finance lease liabilities | 17 | $ 18
Total lease liability | $ 4,633 |

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