Stock-Based Compensation (Details) - Summary of Stock Options Activity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Summary of Stock Options Activity [Abstract]
Awards outstanding at December 31, 2013	4,435,536
Awards outstanding at December 31, 2013	$ 1.89
Options granted	45,958	410,000
Options granted	$ 2.27
Options exercised	(63,164)	0
Options exercised	$ 1.88
Options cancelled	(1,722)
Options cancelled	$ 1.90
Options expired	(20,391)
Options expired	$ 3.30
Awards outstanding at March 31, 2014	4,396,217
Awards outstanding at March 31, 2014	$ 1.88
Awards outstanding at March 31, 2014	4 years 178 days
Awards outstanding at March 31, 2014	$ 3,320
Awards vested and expected to vest at March 31, 2014	4,041,994
Awards vested and expected to vest at March 31, 2014	$ 1.88
Awards vested and expected to vest at March 31, 2014	4 years 175 days
Awards vested and expected to vest at March 31, 2014	3,068
Awards exercisable at March 31, 2014	1,450,586
Awards exercisable at March 31, 2014	$ 1.87
Awards exercisable at March 31, 2014	4 years 105 days
Awards exercisable at March 31, 2014	$ 1,169