CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $)	6 Months Ended
	Jul. 31, 2011	Jul. 31, 2010
Cash flows from operating activities
Net income	$ 2,902,741	$ 2,963,808
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	955,777	882,993
Deferred income taxes	(1,212)	(1,203)
(Gain)/Loss on sales of property and equipment, net	(27,496)	668
Stock-based compensation	359,652	322,944
Allowance for doubtful accounts	57,456	(29,709)
Change in operating assets and liabilities:
Accounts receivable	(1,357,446)	(875,673)
Inventories	(1,379,911)	1,151,115
Prepaid expenses, deposits and other assets	(162,928)	282,742
Accounts payable and accrued expenses	1,650,817	1,063,414
Customers' advances	372,567	(237,335)
Accrued pension retirement benefits	(2,751,787)	(166,385)
Other non-current liabilities	1,098	(165,287)
Net cash provided by operating activities	619,328	5,192,092
Cash flows from investing activities
Proceeds from sales of property and equipment	33,990	0
Acquisitions of property and equipment	(918,049)	(527,064)
Purchase of investments	(1,010,534)	(497,155)
Proceeds from maturities of investments	497,155	240,893
Net cash used in investing activities	(1,397,438)	(783,326)
Cash flows from financing activities
Proceeds from new borrowing	407,759	189,074
Reduction of debt	(385,819)	(263,430)
Exercise of stock options	42,800	252,924
Payment of dividends	(1,934,975)	(1,754,220)
Purchase of treasury shares	(42,800)	(266,847)
Net cash used in financing activities	(1,913,035)	(1,842,499)
Effect of exchange rate changes on cash	11,572	14,506
Net (decrease) increase in cash and cash equivalents	(2,679,573)	2,580,773
Cash and cash equivalents at February 1	32,400,814	30,662,104
Cash and cash equivalents at July 31	$ 29,721,241	$ 33,242,877