Net Income (Loss) per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Numerator
Net income (loss)	$ (2,222)	$ 3,570	$ (4,632)	$ 1,775
Preferred stock dividend forfeited (earned)	(205)	(3)	(281)	75
Numerator for basic EPS net income (loss) attributable to common stockholders	(2,427)	3,567	(4,913)	1,850
Effect of dilutive securities:
Preferred stock dividends
Numerator for diluted EPS - net income (loss) attributable to common stockholders	$ (2,427)	$ 3,567	$ (4,913)	$ 1,850
Weighted-average shares outstanding:
Basic EPS	13,253	533	8,995	224
Effect of dilutive convertible preferred stock and warrants		12,347		48,472
Denominator for diluted EPS	13,253	12,880	8,995	48,696
Basic EPS	$ (0.18)	$ 6.69	$ (0.55)	$ 8.25
Diluted EPS	$ (0.18)	$ 0.28	$ (0.55)	$ 0.04