Stock-Based Compensation - Summary of Changes in Unvested Restricted Stock Units (Parenthetical) (Detail)	3 Months Ended
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted unit vest and convert into common stock over next fiscal year	218,874
Number of restricted unit would vest over vesting period	376,000
Restricted stock units vest and convert into shares of our common stock	4 years
Restricted stock units vested description after specified period	25
Restricted stock unit vest description	376,000 of these restricted stock units will vest and convert into shares of our common stock over a four year period
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of grant date	1 year

218,874

4 years

376,000 of these restricted stock units will vest and convert into shares of our common stock over a four year period