CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (unaudited) (USD $)	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) [Member]	Treasury Shares [Member]	Total
Balances at Jan. 31, 2011	$ 1,592,868	$ 3,448,249	$ 93,113,247	$ (3,201,767)	$ (10,479,673)	$ 84,472,924
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	4,984,627	0	0	4,984,627
Other comprehensive (loss) income, net of tax	0	0	0	41,799	0	41,799
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 3,717 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
Balances at Jan. 31, 2012	1,592,868	4,058,735	96,228,764	(7,718,883)	(10,339,513)	83,821,971
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	5,669,432	0	0	5,669,432
Other comprehensive (loss) income, net of tax	0	0	0	(49,432)	0	(49,432)
Dividends	0	0	(3,153,064)	0	0	(3,153,064)
Stock-based compensation	0	747,347	0	0	0	747,347
RSU transactions	0	(69,344)	0	0	69,344	0
Balances at Oct. 31, 2012	$ 1,592,868	$ 4,736,738	$ 98,745,132	$ (7,768,315)	$ (10,270,169)	$ 87,036,254