Stock Option Plans (Details) - Schedule of Share-Based Compensation (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Schedule of Share-Based Compensation [Abstract]
Outstanding at January 31, 2013	168,755
Outstanding at January 31, 2013 (in Dollars per share)	$ 12.46
Exercised	(62,915)
Exercised (in Dollars per share)	$ 12.63	$ 32.53
Outstanding and exercisable at October 31, 2013	105,840
Outstanding and exercisable at October 31, 2013 (in Dollars per share)	$ 12.37
Outstanding and exercisable at October 31, 2013	219 days
Outstanding and exercisable at October 31, 2013 (in Dollars)	$ 1,744