Leases - Future Maturities of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
2019	$ 431
2020	589
2021	605
2022	622
2023	532
Total undiscounted lease payments	2,779
Less: unrecognized interest	(555)
Total lease liability	2,224
Finance Leases
2019	443
2020	567
2021	448
2022	169
Total undiscounted lease payments	1,627
Less: unrecognized interest	(217)
Plus: residual value guarantees	386
Total lease liability	$ 1,796