Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Share-Based Compensation - Additional Information 3 (Detail)

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Stockholders' Equity and Share-Based Compensation - Additional Information 3 (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Sep. 30, 2013
Employees
Mar. 29, 2014
Mar. 29, 2014
Warrants [Member]
Mar. 29, 2014
Warrants Exercise Price One [Member]
Warrants [Member]
Mar. 29, 2014
Warrants Exercise Price Two [Member]
Warrants [Member]
Jul. 31, 2013
Stock Option Exchange Program [Member]
Mar. 29, 2014
Stock Option Exchange Program [Member]
Mar. 29, 2014
Stock Option Exchange Program [Member]
Stock Options Vest One Year [Member]
Mar. 29, 2014
Stock Option Exchange Program [Member]
Vest After One Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Exercise price of shares issued under exchange program   $ 2.12       $ 4.00      
Option exchange ratio             $ 3.5    
Shares issued under exchange program           3,733,000      
Stock option exercise price, minimum           $ 4.01      
Stock option exercise price, maximum           $ 11.68      
Stock options vesting period             4 years    
Stock options vesting, description             The terms and conditions of the new options are subject to an entirely new four year vesting schedule where 25% will vest on the first anniversary, and the remaining 75% will vest monthly over the following 36 months. All new options have a ten year contractual term.    
Stock options vested, percentage               25.00% 75.00%
Stock options contractual term   4 years 7 months 2 days         10 years    
Stock options exercisable, number 3,475,000                
Stock options exercised, weighted average exercise price $ 6.65                
Eligible employees 45                
Option unvested exercisable number 993,000                
Options unvested exercise price $ 0.9866                
Incremental fair value on the date of exchange $ 422                
Vesting period of the new options   4 years              
Outstanding common stock warrants     50            
Common stock warrants issued during period       30 20        
Warrant exercise price for warrants issued during period       2.14 8.32        
Expiration of warrant, date       May 05, 2016 Apr. 27, 2017        
Warrants exercised during period     0            
Aggregate intrinsic value of outstanding and exercisable warrants     $ 25