Annual report pursuant to section 13 and 15(d)

Per Share Data (Computations of Basic and Diluted Per Share) (Detail)

v2.4.0.6
Per Share Data (Computations of Basic and Diluted Per Share) (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Earnings Per Share Disclosure [Line Items]                      
Net (loss) income                 $ (16,354) $ 3,893 $ (10,951)
Basic weighted average common shares         182,870,313 182,810,137 183,048,031 183,366,512 183,572,582 183,023,590 175,698,489
Effect of dilutive securities:                      
Options to purchase common stock                 0 3,616,816 0
Warrants to purchase common stock                 0 2,313,636 0
Restricted shares                 0 59,986 0
Dilutive potential common shares                 0 5,990,438 0
Diluted weighted average common shares         194,014,913 182,810,137 187,005,916 186,327,158 183,572,582 189,014,028 175,698,489
Net (loss) income per share:                      
Basic and diluted $ (0.01) $ (0.03) $ (0.03) $ (0.02) $ 0.03 [1] $ (0.02) [1] $ 0.00 [1] $ 0.00 [1] $ (0.09) $ 0.02 $ (0.06)
[1] Due to rounding, the sum of the quarters' basic and diluted income (loss) per common share amounts does not equal the full fiscal year amount.