Ordinary Shares - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended						12 Months Ended
	Oct. 11, 2012	Dec. 31, 2013 Vote	Oct. 11, 2012 Initial public offering	Dec. 31, 2012 Initial public offering	Oct. 11, 2012 Conversion of redeemable convertible preferred shares	Jul. 30, 2013 Follow-On Offering	Oct. 11, 2012 Company Stock Initial public offering	Jul. 30, 2013 Company Stock Follow-On Offering	Oct. 11, 2012 Selling Shareholders Initial public offering	Jul. 30, 2013 Selling Shareholders Follow-On Offering	Dec. 31, 2013 Stock Options	Dec. 31, 2012 Stock Options	Dec. 31, 2010 Chief Executive Officer Stock Options	Dec. 31, 2006 Chief Executive Officer Stock Options
Class of Stock [Line Items]
Ordinary shares, number of votes per share		1
Dividends declared		$ 0
Shares issued					26,653,383		6,250,000	1,000,000	2,734,375	9,925,000
Issuance of shares, value per share			$ 17.00
Net proceed from initial public offering	$ 93,313
Issuance of shares, value per share						$ 33.00
Net proceed from follow-on public offering				$ 94,667		$ 32,060
Stock option for the purchase of ordinary shares, granted														466,666
Stock option, vesting period														4 years
Stock option, vesting description														25% on the first anniversary of the grant date and monthly thereafter over the following 36 months
Stock option exercised											1,424,273	184,335		466,666
Stock option vested													466,666