Stockholders' Equity (Deficiency) - Outstanding Options Granted to Consultants for Sales and Pre-Marketing Services (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	516,940
Exercise price per share	$ 29.422
Options exercisable	2,682,549
Consultants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	77,390
Options exercisable	41,423
Consultants [Member] | December 2006 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	40,090
Exercise price per share	$ 0.901
Options exercisable	40,090
Exercisable through	2016-12
Grant date	2006-12
Consultants [Member] | February 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	4,000
Exercise price per share	$ 12.470
Options exercisable	1,333
Exercisable through	2023-02
Grant date	2013-02
Consultants [Member] | August 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	5,000
Exercise price per share	$ 21.140
Exercisable through	2023-08
Grant date	2013-08
Consultants [Member] | October 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	1,250
Exercise price per share	$ 24.230
Exercisable through	2023-10
Grant date	2013-10
Consultants [Member] | March 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	18,350
Exercise price per share	$ 39.860
Exercisable through	2024-03
Grant date	2014-03
Consultants [Member] | May 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	8,700
Exercise price per share	$ 22.010
Exercisable through	2024-05
Grant date	2014-05