Leases - Future minimum payments for finance and operating leases (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Finance leases
2020	$ 251
2021	251
2022	251
2023	20
Total future minimum lease payments	773
Amounts representing interest	(83)
Total operating lease liabilities	690
Operating leases
2020	2,291
2021	1,676
2022	1,579
2023	1,506
2024	1,061
Thereafter	2,460
Total future minimum lease payments	10,573
Amounts representing interest	(1,172)
Total operating lease liabilities	$ 9,401