Summary of Significant Accounting Policies - Additional Information (Details) (USD $)	3 Months Ended		9 Months Ended					9 Months Ended		12 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Jan. 31, 2013	Oct. 31, 2013 Employee Severance	Oct. 31, 2012 Employee Severance	Oct. 31, 2013 Convertible Preferred Stock	Oct. 31, 2013 Restricted Stock	Jan. 31, 2013 Restricted Stock	Oct. 31, 2013 Stock Options	Oct. 31, 2012 Stock Options	Oct. 31, 2013 Stock Options	Oct. 31, 2012 Stock Options	Oct. 31, 2013 Warrant	Oct. 31, 2012 Warrant
Summary Of Significant Accounting Policies
Deferred professional costs	$ 368,000		$ 368,000		$ 201,000
Accumulated amortization of professional expenses	85,000		85,000		35,000
Severance expenses	0	207,000	380,000	277,000
Accrued severances						13,000	548,000
Share-based compensation expense	378,000	245,000	1,203,919	645,407
Reserves for uncertain tax positions and corresponding interest and penalties	$ 152,000		$ 152,000		$ 152,000
Antidilutive securities								3,249,995	29,698	137,327	2,549,178	2,310,218	2,562,317	2,585,079	1,400,000	0