Leases - Schedule of Rent Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease expense	$ 759	$ 1,560
Variable and short-term lease expense	121	193
Rent expense	$ 880	$ 1,753