Stock-Based Compensation (Details 1) (USD $)	3 Months Ended
	Apr. 30, 2013
Summary of change in number of non-vested options to purchase shares of common stock
Nonvested, Beginning balance, Shares	388,500
Nonvested, Beginning balance, Weighted Average Fair Value	$ 5.67
Granted, Shares	71,000
Granted, Weighted Average Fair Value	$ 3.27
Forfeited, Shares
Forfeited, Weighted Average Fair Value
Vested, Shares	(163,000)
Vested, Weighted Average Fair Value	$ 5.35
Nonvested, Ending balance, Shares	296,500
Nonvested, Ending balance, Weighted Average Fair Value	$ 5.27