Leases - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease, liability	$ 179
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, liability		$ 300
Right-of-use asset		$ 300
Minimum
Lessee, Lease, Description [Line Items]
Non-cancelable primary lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Non-cancelable primary lease term	2 years