Annual report pursuant to Section 13 and 15(d)

Net Loss Per Common Share - Warrants, Options and Purchase Rights Excluded from Computation of Diluted Net Loss Per Common Share (Detail)

v2.4.0.8
Net Loss Per Common Share - Warrants, Options and Purchase Rights Excluded from Computation of Diluted Net Loss Per Common Share (Detail)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Stock Purchase Plan (ESPP) [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares issuable 64 79 70
Employee Stock Options [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares issuable 6,527 5,099 3,672
Warrants [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares issuable 8,282 11,583 16,643