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Leases - Supplemental cash flow information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |
Operating cash flows from operating leases | $ 185 | $ 191 | $ 376 | $ 379
Operating cash flows from short-term leases | 3 | 10 | 13 | 19
Operating cash flows from finance leases | 3 | 12 | 8 | 25
Financing cash flows from finance leases | 87 | 79 | 173 | 157
Operating leases |  |  |  | 4
Cash received from subleases | $ 112 | $ 112 | $ 225 | $ 225

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