Basic and Diluted Net Loss Per Common 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 loss	$ (10,182)	$ (6,823)	$ (27,758)	$ (17,828)
Denominator
Weighted average common shares Denominator for basic calculation	23,825	74	21,984	124
Weighted average common shares Denominator for diluted calculation	23,825	74	21,984	124
Net loss per share:
Basic	$ (0.43)	$ (92.21)	$ (1.26)	$ (143.77)
Diluted	$ (0.43)	$ (92.21)	$ (1.26)	$ (143.77)