Annual report pursuant to section 13 and 15(d)

Summary of Significant Accounting Policies - Anti Dilutive Securities Excluded From Computation of Diluted Net Loss Per Share (Detail)

v2.4.0.8
Summary of Significant Accounting Policies - Anti Dilutive Securities Excluded From Computation of Diluted Net Loss Per Share (Detail)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Redeemable Convertible Preferred Stock [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from the computation of diluted loss per share   661
Common Stock [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from the computation of diluted loss per share 577 104
Warrants for common stock [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from the computation of diluted loss per share 1,743 28