Leases (Details) - USD ($) $ in Thousands	6 Months Ended
Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Leases
Cash paid for operating lease liabilities	$ 947	$ 1,044
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 135	$ 471