Leases - Schedule of Operating and Finance Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Leases [Abstract]
2019 (excluding the three months ended March 31, 2019)		$ 1,419
2020		1,815
2021		1,458
2022		1,216
2023
2024
Total lease payments		5,908
Less: Imputed interest		(860)
Total	$ 5,048	5,048
2019 (excluding the three months ended March 31, 2019)		459
2020		605
2021		602
2022		327
2023		255
2024		42
Total lease payments		2,290
Less: Imputed interest		(399)
Total	$ 1,891	$ 1,891