Annual report pursuant to Section 13 and 15(d)

Net Loss Per Common Share - Reconciliation of Numerator and Denominator (Detail)

v2.4.0.8
Net Loss Per Common Share - Reconciliation of Numerator and Denominator (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Numerator:                      
Net loss $ (7,589) $ 1,176 $ (12,788) $ (9,214) $ 28,388 $ (991) $ 17,001 $ (115,533) $ (28,415) $ (71,135) $ (25,653)
Denominator:                      
Weighted-average number of common shares outstanding                 57,832 54,219 45,900
Net loss per share:                      
Basic $ (0.13) $ 0.02 $ (0.22) $ (0.16) $ 0.50 $ (0.02) $ 0.31 $ (2.30) $ (0.49) $ (1.31) $ (0.56)
Diluted $ (0.13) $ (0.08) $ (0.22) $ (0.16) $ (0.10) $ (0.06) $ (0.04) $ (2.30) $ (0.49) $ (1.31) $ (0.56)