Leases - Maturity (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating leases
2019 - remaining	$ 3,476
2020	4,689
2021	4,721
2022	4,569
2023	3,814
2024	3,899
Thereafter	4,181
Total undiscounted lease payments	29,349
Less imputed interest	(3,952)
Total lease liabilities	25,397
Finance leases
2019 - remaining	99
2020	126
2021	48
2022	0
2023	0
2024	0
Thereafter	0
Total undiscounted lease payments	273
Less imputed interest	(17)
Total lease liabilities	$ 256