Stock-Based Compensation (Details Textual) (USD $)	12 Months Ended				12 Months Ended			12 Months Ended				12 Months Ended		12 Months Ended		3 Months Ended		12 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2013 Maximum [Member]	Jan. 31, 2013 Minimum [Member]	Jan. 31, 2013 Time Based Options Prior to Merger [Member]	Jan. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jan. 31, 2012 Restricted Stock Units (RSUs) [Member]	Jan. 31, 2011 Restricted Stock Units (RSUs) [Member]	Oct. 31, 2012 Restricted Stock Units (RSUs) [Member]	Jan. 31, 2013 Restricted Stock Units (RSUs) [Member] Minimum [Member]	Jan. 31, 2013 Performance Shares [Member]	Jan. 31, 2013 2006 Stock Incentive Plan [Member]	Jan. 31, 2013 Time Based Options [Member]	Oct. 31, 2012 Modified awards ranging from 3 months to 2.25 years [Member]	Oct. 31, 2012 Unvested performance based options [Member]	Jan. 31, 2013 Unvested performance based options [Member]	Oct. 31, 2012 Unvested performance based options [Member] Maximum [Member]	Oct. 31, 2012 Unvested performance based options [Member] Minimum [Member]	Jan. 31, 2013 Robert Pender [Member] Restricted Stock Awards [Member]
Stock Based Compensation (Textual) [Abstract]
Stock option vested and become exercisable														3 years			2 years
Performance targets in years														3 years
Expiration of granted option														10 years
Exercise price of stock options	$ 2.72
Common stock reserved for issuance upon the exercise	15,413,815
Expected dividend yield	0.00%	0.00%	0.00%
Restricted stock units granted								310,000	45,000	300,000
Cancelled, Shares								(185,000)	(750,000)	(100,000)
Number of options outstanding	7,799,011	8,582,511	11,046,652	10,212,401			922,810						1,994,344		4,881,857
Number of options vested and expected to vest	4,435,976																3,000,000
Weighted average exercise price of options vested and expected to vest	$ 3.01
Common stock issued, Shares transferred																					112,681
Common stock issued, Shares	995,000																				307,200
Performance target for achievement																			150.00%	50.00%
Compensation expense for awards recognized	$ 1,613,000	$ 1,395,000	$ 3,585,000													$ 600,000		$ 100,000
Common stock options exercised	48,000	3,000	24,000
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Outstanding Aggregate Fair Value																	3,100,000
Unrecognized compensation costs recognition period					3 years	2 years						3 years
Number of Options Outstanding, Granted	2,341,000	827,500	1,680,000
Number of Options Outstanding, Cancelled	2,607,854	3,210,631	764,642
Restricted stock units outstanding											$ 800,000
Non-vested shares	0
Unrecognized compensation costs	1,900,000							900,000
Stock Based Compensation (Additional Textual) [Abstract]
Aggregate intrinsic value of options outstanding	1,091,000	8,009,000	8,772,000	3,524,000
Extension of vesting period of performance based options granted	Approximately one to two years
Provision for expenses for non fulfillment of performance target	$ 0