401(k) Savings Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employer match of employee contributions (as a percent)	100.00%
Employee earnings subject to employer match (as a percent)	4.00%
Company contributions	$ 99	$ 60	$ 51