Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
(Provision for) benefit from income taxes	$ 13	$ (45)	$ (14)	$ 110
Effective income tax rate	0.38%	1.63%	0.15%	1.79%
Unrecognized tax benefits	$ 300		$ 300
Unrecognized tax benefits that would favorably impact effective tax rate	$ 200		$ 200