Leases - Supplemental cash flow information (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 188
Operating cash flows from short-term leases	9
Operating cash flows from finance leases	13
Financing cash flows from finance leases	78
Operating leases	4
Cash received from subleases	$ 113