Stockholders' Equity - MGM Warrant (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jul. 31, 2013
Warrants and Rights Note Disclosure [Abstract]
Non-cash warrant (benefit)/expense	$ (55)	$ 2,009	$ 1,192
Shares vested	2,422
Black-Sholes Valuation Assumptions
Risk-free interest rate	1.39%	1.34%	1.34%
Expected volatility	52.30%	51.80%	52.00%
Expected term (years)	4 years	4 years	4 years
MGM Warrant
Warrants and Rights Note Disclosure [Abstract]
Number of shares, if warrants exercised				3,333
Number of Shares Outstanding Under Warrant	2,667
James Bond Related Warrants
Warrants and Rights Note Disclosure [Abstract]
Non-cash warrant (benefit)/expense		$ 1,928
Shares vested		1,000
Warrants
Warrants and Rights Note Disclosure [Abstract]
Number of Shares Outstanding Under Warrant	4,267	4,267	3,617
Shares issued, warrants exercised	0	450	1,191
Black-Sholes Valuation Assumptions
Risk-free interest rate	1.76%	1.18%	1.90%
Expected volatility	57.54%	53.40%	58.20%
Expected term (years)	4 years 9 months 11 days	5 years	5 years