Net Loss Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net Loss Per Common Share
Number of outstanding options not included in computation of Diluted EPS (in shares)	3,991,000	5,738,000
Numerator
Net loss	$ (682)	$ (11,063)
Denominator
Weighted average number of common shares outstanding	50,881,000	53,844,000
Weighted average number of shares for diluted net (loss) per common share	50,881,000	53,844,000
Basic loss per share (in dollars per share)	$ (0.01)	$ (0.21)
Diluted loss per share (in dollars per share)	$ (0.01)	$ (0.21)