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Leases - Supplemental cash flow information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 182	$ 561
Operating cash flows from short-term leases	10	29
Operating cash flows from finance leases	6	25
Financing cash flows from finance leases	91	248	$ 206
Operating leases	212	216
Cash received from subleases	$ 113	$ 338

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Amount of interest paid on finance lease liability.

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Amount of cash outflow for principal payment on finance lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of cash outflow for short-term lease payment excluded from lease liability.

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