Redeemable Convertible Preferred Shares - Additional Information (Detail) 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				1 Months Ended	12 Months Ended				1 Months Ended	12 Months Ended
	Oct. 11, 2012	Dec. 31, 2013	Jul. 30, 2010 Minimum USD ($)	Dec. 31, 2013 Minimum USD ($)	Jul. 31, 2008 Series A Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2011 Series A Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2010 Series A Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2013 Series A Redeemable Convertible Preferred Shares USD ($)	Jul. 31, 2008 Series A Redeemable Convertible Preferred Shares EUR (€)	Jul. 31, 2010 Series B Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2011 Series B Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2010 Series B Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2013 Series B Redeemable Convertible Preferred Shares USD ($)	Jul. 31, 2010 Series B Redeemable Convertible Preferred Shares EUR (€)	Nov. 30, 2010 Series C Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2011 Series C Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2010 Series C Redeemable Convertible Preferred Shares USD ($)	Dec. 31, 2013 Series C Redeemable Convertible Preferred Shares USD ($)	Nov. 30, 2010 Series C Redeemable Convertible Preferred Shares EUR (€)
Class of Stock [Line Items]
Redeemable convertible preferred shares, par value									€ 0.01375178					€ 0.01375178					€ 0.01000000
Shares issued upon conversion of redeemable convertible preferred shares to ordinary shares	26,653,383
Percentage of series holders' consent needed to make changes to rights and preferences of that series		75.00%
Preferred Shares, redemption term		The Preferred Shares were redeemable at the option of the holders of at least a majority of the then outstanding shares of Preferred Shares, voting together as a single class on a fully converted basis. The Preferred Shares were redeemable in three annual installments, beginning on the date following the fourth anniversary of the original issue date of the Series C preferred shares (that is, on November 23, 2014) and ending on the date two years from such first redemption date
Preferred Shares, redemption price per share								$ 4.49					$ 3.09					$ 3.50
Preferred Shares, conversion price per share					$ 5.904116	$ 4.209375	$ 4.209375			$ 4.635	$ 4.635	$ 4.635			$ 5.25	$ 5.25	$ 5.25
Preferred Shares, conversion term		Each preferred share automatically converts into ordinary shares at the then effective conversion price immediately upon the closing of the Company's first underwritten public offering in which the aggregate proceeds raised exceed $50,000 and pursuant to which the initial price to the public is at least $13.91 per share (as adjusted for any share capital subdivision or consolidation)
Preferred stock conversion trigger, aggregate gross cash proceeds from underwritten public offering			$ 50,000	$ 50,000
Shares issued, price per share			$ 13.91	$ 13.91
Liquidation Preference								$ 4.49					$ 3.09					$ 3.50