v2.4.0.6
Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Net (Loss) Income Per Common Share) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Summary Of Significant Accounting Policies [Abstract]                      
Net (loss) income $ (3,289) $ (3,938) $ (8,229) $ (334) $ (495) $ (2,135) $ 825 $ 229 $ (15,790) $ (1,576) $ 3,969
Basic $ (0.10) $ (0.12) $ (0.26) $ (0.01) $ (0.02) $ (0.07) $ 0.03 $ 0.01 $ (0.49) $ (0.05) $ 0.13
Diluted $ (0.10) $ (0.12) $ (0.26) $ (0.01) $ (0.02) $ (0.07) $ 0.03 $ 0.01 $ (0.49) $ (0.05) $ 0.13
Weighted-average shares outstanding-common stock, basic 33,159,350 32,492,939 31,832,105 31,656,904 31,449,665 31,223,077 30,965,800 30,630,461 32,289,877 31,070,018 30,014,085
Options to purchase common stock                     915,025
Unvested restricted stock units                     32,930
Warrants to purchase common stock                     8,602
Weighted-average shares outstanding-common stock, diluted 33,159,350 32,492,939 31,832,105 31,656,904 31,449,665 31,223,077 31,736,718 31,475,136 32,289,877 31,070,018 30,970,642