Right-of-use Asset and Lease Liability - Operating lease information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($) item
Right-of-use Asset and Lease Liability
Cash paid for operating lease liabilities	$ 371
Right-of-use assets obtained in exchange for new operating lease obligations	$ 2,163
Weighted-average remaining lease term	7 years 4 months 24 days
Weighted-average discount rate	3.40%
New operating leases which commenced | item	0