CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (unaudited) (USD $)	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Shares [Member]	Total
Balances at Jan. 31, 2010	$ 1,592,868	$ 2,988,950	$ 90,662,820	$ (3,679,641)	$ (10,587,413)	$ 80,977,584
Comprehensive income:
Net income	0	0	4,383,007	0	0	4,383,007
Foreign currency translation adjustment	0	0	0	(6,615)	0
Interest rate swap, net of tax	0	0	0	(73,757)	0
Total comprehensive income						4,302,635
Dividends	0	0	(2,721,259)	0	0	(2,721,259)
Stock-based compensation	0	484,416	0	0	0	484,416
Stock option transactions	0	(133,034)	0	0	680,266	547,232
Purchase of treasury shares	0	0	0	0	(660,019)	(660,019)
Balances at Oct. 31, 2010	1,592,868	3,340,332	92,324,568	(3,760,013)	(10,567,166)	82,930,589
Balances at Jan. 31, 2011	1,592,868	3,448,249	93,113,247	(3,201,767)	(10,479,673)	84,472,924
Comprehensive income:
Net income	0	0	4,984,627	0	0	4,984,627
Foreign currency translation adjustment	0	0	0	80,375	0
Interest rate swap, net of tax	0	0	0	(38,576)	0
Total comprehensive income						5,026,426
Dividends	0	0	(2,975,887)	0	0	(2,975,887)
Stock-based compensation	0	539,478	0	0	0	539,478
Stock option transactions	0	1,500	0	0	41,300	42,800
Purchase of treasury shares	0	0	0	0	(42,800)	(42,800)
Balances at Oct. 31, 2011	$ 1,592,868	$ 3,989,227	$ 95,121,987	$ (3,159,968)	$ (10,481,173)	$ 87,062,941