Stockholders' Equity (Details) - Summary of Stock Options Activity (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of Stock Options Activity [Abstract]
Awards outstanding, December 31, 2012	3,251,849
Awards outstanding, December 31, 2012 (in Dollars per share)	$ 2.22
Options granted	1,645,534	2,800,000	730,000
Options granted (in Dollars per share)	$ 2.02
Options exercised	(42,578)
Options exercised (in Dollars per share)	$ 1.75
Options cancelled	(117,029)
Options cancelled (in Dollars per share)	$ 2.43
Options expired	(302,240)
Options expired (in Dollars per share)	$ 6.01
Awards outstanding, December 31, 2013	4,435,536	3,251,849
Awards outstanding, December 31, 2013 (in Dollars per share)	$ 1.89	$ 2.22
Awards outstanding, December 31, 2013	4 years 255 days
Awards outstanding, December 31, 2013 (in Dollars)	$ 1,806
Awards vested and expected to vest at December 31, 2013	4,011,951
Awards vested and expected to vest at December 31, 2013 (in Dollars per share)	$ 1.88
Awards vested and expected to vest at December 31, 2013	4 years 248 days
Awards vested and expected to vest at December 31, 2013 (in Dollars)	1,654
Awards exercisable at December 31, 2013	1,202,084
Awards exercisable at December 31, 2013 (in Dollars per share)	$ 1.90
Awards exercisable at December 31, 2013	4 years 131 days
Awards exercisable at December 31, 2013 (in Dollars)	$ 557