Stock-Based Compensation (Details 1) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Summary of change in number of non-vested options to purchase shares of common stock
Nonvested, Beginning balance, Shares	212,500	237,000
Nonvested, Beginning balance, Weighted Average Fair Value	$ 5.09	$ 6.31
Granted, Shares	293,000	212,500
Granted, Weighted Average Fair Value	$ 5.65	$ 5.09
Vested, Shares	(207,500)	(232,000)
Vested, Weighted Average Fair Value	$ 5.06	$ 6.34
Forfeited, Shares	(5,000)	(5,000)
Forfeited, Weighted Average Fair Value	$ 6.32	$ 4.98
Nonvested, Ending balance, Shares	293,000	212,500
Nonvested, Ending balance, Weighted Average Fair Value	$ 5.65	$ 5.09