Stock Based Compensation - Weighted Average Assumptions (Details) (USD $)	12 Months Ended
	Jan. 31, 2013		Jan. 31, 2012
Share-based Compensation [Abstract]
Expected life	5 years		5 years
Risk-free interest rate	0.00%		0.00%
Weighted average volatility factor	57.00%		72.00%
Dividend yield	$ 0.00		$ 0.00
Forfeiture rate	0.00%		0.00%
Number of Options Outstanding	2,685,237		1,920,550
Number of Options Exercisable			553,945
Average Exercise Price, Outstanding (USD per share)	$ 2.96	[1]	$ 2.22
Average Exercise Price, Exercisable (USD per share)	$ 2.27	[2]	$ 2.53
Remaining Life in Years, Outstanding	8 years 3 months 18 days		8 years
Remaining Life in Years, Exercisable	6 years 7 months 6 days		6 years 8 months 12 days

[1] (1)The exercise prices range from $1.46 to $6.03, of which 1,452,237 shares are between $1.46 and $2.00 per share, 420,000 shares are between $2.08 and $4.00 per share, and 813,000 shares are between $4.08 and $6.03 per share.

[2] (2)The exercise prices range from $1.46 to $6.03, of which 716,879 shares are between $1.46 and $2.00 per share, 184,165 shares are between $2.08 and $4.00 per share, and 75,000 shares are between $4.08 and $6.03 per share.