CONSOLIDATED STATEMENTS 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, 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	2,902,741	0	0	2,902,741
Other comprehensive (loss) income, net of tax	0	0	0	319,187	0	319,187
Dividends	0	0	(1,935,059)	0	0	(1,935,059)
Stock-based compensation	0	359,652	0	0	0	359,652
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 Jul. 31, 2011	1,592,868	3,809,401	94,080,929	(2,882,580)	(10,481,173)	86,119,445
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	2,878,697	0	0	2,878,697
Other comprehensive (loss) income, net of tax	0	0	0	(325,831)	0	(325,831)
Dividends	0	0	(2,087,135)	0	0	(2,087,135)
Stock-based compensation	0	593,561	0	0	0	593,561
RSU transactions	0	(69,344)	0	0	69,344	0
Balances at Jul. 31, 2012	$ 1,592,868	$ 4,582,952	$ 97,020,326	$ (8,044,714)	$ (10,270,169)	$ 84,881,263