Employee Stock Compensation (Details) (USD $)	6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Number of Shares, Outstanding	18,200
Number of Shares, Granted during the six months ended July 31, 2012	10,000
Number of Shares, Outstanding	26,000
Number of Shares, Exercisable	26,000
Number of Shares, Directors' Plan	21,300
Weighted Average Exercise Price per Share, Outstanding	$ 7.31
Weighted Average Exercise Price per Share, Granted during the six months ended July 31, 2012	$ 6.44
Weighted Average Exercise Price per Share, Outstanding	$ 7.51
Weighted Average Exercise Price per Share, Exercisable	$ 7.51
Weighted Average Remaining Contractual Term, Outstanding	4 years 3 months 28 days	3 years 4 months 16 days
Weighted Average Remaining Contractual Term, Granted during the six months ended July 31, 2012	5 years 10 months 20 days
Weighted Average Remaining Contractual Term, Exercisable at July 31, 2012	4 years 3 months 28 days
Aggregate Intrinsic Value, Outstanding	$ 10,230
Aggregate Intrinsic Value, Granted during the six months ended July 31, 2012	12,600
Aggregate Intrinsic Value, Outstanding	20,050
Aggregate Intrinsic Value, Exercisable	$ 20,050