Shareholders' Equity (Details 2) (USD $)			12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013 Range One [Member]	Jan. 31, 2013 Range Two [Member]	Jan. 31, 2013 Range Three [Member]
Summary of options outstanding
Range of Exercise prices, Lower Range Limit			$ 2.40	$ 6.22	$ 9.81
Range of Exercise prices, Upper Range Limit			$ 5.78	$ 9.59	$ 11.90
Outstanding, Options			18,439	756,073	142,100
Option outstanding, total	916,612	888,097
Outstanding, Weighted Average Exercise Price			$ 5.15	$ 7.97	$ 11.54
Outstanding Remaining Contractual Life			3 years 9 months 18 days	4 years 6 months	3 years 10 months 24 days
Exercisable, Options			18,439	550,573	142,100
Option exercisable, total	711,112
Exercisable, Weighted Average Exercise Price			$ 5.15	$ 8.01	$ 11.54