Series A Preferred Stock - Liquidation Preference and Share Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Temporary Equity [Line Items]
Preferred shares, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred shares liquidation preference	$ 0	$ 256,017
Series A Preferred Stock
Temporary Equity [Line Items]
Preferred shares, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred shares, initial liquidation preference per share	$ 1,000	$ 1,000
Temporary Equity liquidation preference dividend, percent	20.00%	20.00%