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Stockholders' Equity and Stock-Based Compensation - Summary of Pre-Conversion Grant-Date Fair Values of Incentive Units Granted and Related Assumptions (Detail) - Incentive Units [Member]
12 Months Ended
Dec. 31, 2013
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate 0.71%
Risk-free interest rate 1.41%
Estimated volatility 50.00%
Expected life (in years) 5 years
Dividend yield 0.00%
Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant-date fair value $ 0.11
Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant-date fair value $ 0.92