Stockholders' Equity (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of stock options outstanding and exercisable
Stock options outstanding, Vested Options	141
Stock options outstanding, Unvested Options	1
Stock options outstanding, Weighted Average Exercise Price	$ 34.77	$ 40.61	$ 49.49
Weighted Average Remaining Contractual Life, Outstanding at December 31, 2013	4 years 7 months 6 days
Stock Options, Shares exercisable at December 31, 2013	141
Stock Options, Weighted Average Exercise Price Exercisable at December 31, 2013	$ 34.90
1.03 - 49.99
Summary of stock options outstanding and exercisable
Range of Exercise Price, Lower Range	$ 1.03
Range of Exercise Price, Upper Range	$ 49.99
Stock options outstanding, Vested Options	101
Stock options outstanding, Unvested Options	1
Stock options outstanding, Weighted Average Exercise Price	$ 12.41
Weighted Average Remaining Contractual Life, Outstanding at December 31, 2013	6 years
Stock Options, Shares exercisable at December 31, 2013	101
Stock Options, Weighted Average Exercise Price Exercisable at December 31, 2013	$ 12.36
50.00 - 99.99
Summary of stock options outstanding and exercisable
Range of Exercise Price, Lower Range	$ 50.00
Range of Exercise Price, Upper Range	$ 99.99
Stock options outstanding, Vested Options	26
Stock options outstanding, Unvested Options
Stock options outstanding, Weighted Average Exercise Price	$ 83.35
Weighted Average Remaining Contractual Life, Outstanding at December 31, 2013	1 year 1 month 28 days
Stock Options, Shares exercisable at December 31, 2013	26
Stock Options, Weighted Average Exercise Price Exercisable at December 31, 2013	$ 83.35
100.00 - 117.80
Summary of stock options outstanding and exercisable
Range of Exercise Price, Lower Range	$ 100
Range of Exercise Price, Upper Range	$ 118
Stock options outstanding, Vested Options	14
Stock options outstanding, Unvested Options
Stock options outstanding, Weighted Average Exercise Price	$ 111.06
Weighted Average Remaining Contractual Life, Outstanding at December 31, 2013	8 months 27 days
Stock Options, Shares exercisable at December 31, 2013	14
Stock Options, Weighted Average Exercise Price Exercisable at December 31, 2013	$ 111.06