Stockholders' Equity (Deficiency) - Outstanding Options Granted to Consultants for Sales and Pre-Marketing Services (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	214,650
Exercise price per share	$ 39.860
Options exercisable	2,581,849
Consultants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	69,877
Options exercisable	41,860
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	December 2006
Consultants [Member] | May 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	687
Exercise price per share	$ 6.800
Options exercisable	687
Exercisable through	2022-05
Grant date	May 2012
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	1,083
Exercisable through	2023-02
Grant date	February 2013
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
Options exercisable
Exercisable through	2023-08
Grant date	August 2013
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
Options exercisable
Exercisable through	2023-10
Grant date	October 2013
Consultants [Member] | March 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options for shares of common stock	18,850
Exercise price per share	$ 39.860
Options exercisable
Exercisable through	2024-03
Grant date	March 2014