Debt - Schedule of Debt (Details) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Less unamortized debt issuance costs	$ (1,285,000)	$ (1,527,000)
Less unamortized debt discount	(634,000)	(751,000)
Less current portion	(10,765,000)	(14,805,000)
Debt, net of current portion	176,218,000	185,552,000
2013 Senior Secured Credit Facility
Debt Instrument [Line Items]
2013 Senior Secured Credit Facility, principal of $520 payable quarterly, matures in July 2020, net of unamortized discount of $751 and $360 as of December 31, 2015 and 2014, respectively	188,902,000	$ 202,635,000
2013 Senior Secured Credit Facility | Term loan
Debt Instrument [Line Items]
Mandatory principal payments	$ 487,000