Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Stock-Based Compensation (Textual) [Abstract]
Compensation expense recognized for stock-based awards granted	$ 259,000	$ 196,000	$ 1,323,000	$ 1,133,000
Accrued compensation expense			$ 211,000
Common stock shares granted			10,000
Options to purchase common stock granted to non-employee			60,000