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Stock-based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 29, 2015
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected term     4 years 4 years
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected dividend rate     0.00% 0.00%
Common stock, shares outstanding     639,065,172 568,847,967
Class of Warrant or Right, Outstanding (in Shares)     5,560,000  
Convertible Preferred Stock, Shares Reserved for Future Issuance (in Shares)     24,907,410  
Fair value of shares vested     $ 4,812 $ 410
2006 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Reserved share, percentage of outstanding shares     9.00%  
Share-based compensation arrangement by share-based payment award, number of shares available for grant (in shares)     0  
Share-based compensation arrangement by share-based payment award, description     The exercise price of any Option will be determined by the Company when the Option is granted and may not be less than 100% of the fair market value of the shares on the date of grant, and the exercise price of any incentive stock option granted to a stockholder with a 10% or greater shareholding will not be less than 110% of the fair market value of the shares on the date of grant.  
2015 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, description     The total number of shares which may be issued under the 2015 Plan is 9% of the number of outstanding and issued ordinary shares of the Company. The Option Price per Share shall be determined by the compensation committee of the Board ("Compensation Committee"), unless expressly approved by the Compensation Committee, shall not be less than 100% of the fair market value of the shares on the date an Option is granted.  
Performance-based Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected term     4 years  
Time-based Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total number of shares granted     46,521,000 24,345,000
Time-based Options | Annually        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage     25.00%  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total number of shares granted 20,468,400   20,468,400 525,000
Restricted Stock Units (RSUs) | Core Management        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock exercised during period, shares   19,200,000    
Restricted Stock Units (RSUs) | Core Management | Vested at the grant date        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage     100.00%  
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, expiration period     5 years  
Share-based compensation arrangement by share-based payment award, award vesting period     1 year  
Minimum | Time-based Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, expiration period     3 years  
Minimum | Restricted Stock Units (RSUs) | Other Management and Staff        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, award vesting period     1 year  
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, expiration period     10 years  
Share-based compensation arrangement by share-based payment award, award vesting period     4 years  
Maximum | Time-based Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, expiration period     10 years  
Maximum | Restricted Stock Units (RSUs) | Other Management and Staff        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, award vesting period     4 years