Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Segment	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of reportable and operating segment | Segment	1
Lessee, operating lease, existence of option to extend	true
Lessee, operating lease, existence of option to terminate	true
Operating lease, liability	$ 2,602
Deferred rent			$ 200
Operating lease right-of-use assets	2,473
ASU 842
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating lease, liability	2,602	$ 2,126
Operating lease, Right of use asset, before reclassification		2,100
Operating lease right-of-use assets	$ 2,473	$ 1,940