Leases - Schedule of Cost Components of Operating Lease (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 109
Variable lease expense	$ 179	[1]
Remaining lease term (years)	3 years
Discount rate	3.75%

[1] Variable lease costs are payments that vary because of changes in facts or circumstances and include common area maintenance and property taxes related to the premises. Variable lease costs are excluded from the calculation of minimum lease payments.