Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease cost	$ 502	$ 502
Variable lease cost	246	243
Short-term lease cost	109	108
Total lease cost	857	853
Cash paid for amounts included in the measurement of lease liabilities	$ 483	$ 469