Stock Plans and Stock-Based Compensation - Schedule of Restricted Stock Unit Activity and Market-based Restricted Stock Unit Activity (Details) - Restricted Stock Units and Market-based Restricted Stock Units	12 Months Ended
	Dec. 31, 2017 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding, Granted	784,000
Number of Shares, Outstanding, Vested	0
Number of Shares, Outstanding, Ending Balance	784,000