Annual report pursuant to Section 13 and 15(d)

401(k) Plan (Details)

v3.3.1.900
401(k) Plan (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]      
Minimum employee eligibility age (years) 18 years    
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 0.5 $ 0.4 $ 0.5