Stockholders' Equity Summary of Restricted Stock Unit Activity and Weighted Average Exercise Price (Details) - Restricted Stock Units (RSUs) [Member] $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Number of Shares (in thousands)
Balance outstanding at December 31, 2015	1,201,500
Granted	0
Released	(266,375)
Forfeited	(145,000)
Non-vested and outstanding at June 30, 2016	791,000
Expected to vest	651,772
Weighted Average Grant Date Fair Value (usd per share)
Non-vested and outstanding at June 30, 2016 | $ / shares	$ 10.31
Non-vested and outstanding at June 30, 2016 | $ / shares	10.31
Expected to vest | $ / shares	$ 10.31
Aggregate Fair Value (in thousands)
Non-vested and outstanding at June 30, 2016 | $	$ 5,009
Expected to vest | $	$ 4,132