Stockholders' Equity (Deficiency) - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Total intrinsic value of options exercised	$ 282
Total unrecognized compensation cost	$ 13,229
Expected period to recognize unrecognized compensation cost	3 years 3 months 18 days
2005 Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Reserved common stock available for issuance		4,713,319
Options granted, number of shares	0	4,656,855
Options vesting period		4 years
2013 Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Reserved common stock available for issuance	1,904,633
Options vesting period	4 years
Shares available for future issuance, description	The number of shares of common stock available for issuance under the 2013 Plan will be increased on January 1, 2016 and on each January 1 thereafter by four percent (4%) of the number of shares of common stock issued and outstanding on each December 31 immediately prior to the date of increase (rounded down to the nearest whole share), but the amount of each increase will be limited to the number of shares of common stock necessary to bring the total number of shares of Common Stock available for grant and issuance under the 2013 Plan to five percent (5%) of the number of shares of common stock issued and outstanding on each December 31.
Percentage of shares available for future issuance out of issued and outstanding common stock	4.00%
Percentage of shares available for future issuance out of issued and outstanding common stock, Maximum	5.00%