CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $)	6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Cash flows from operating activities
Net income	$ 2,878,697	$ 2,902,741
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	989,865	955,777
Stock-based compensation	593,561	359,652
Deferred income taxes	(209,897)	(1,212)
Loss/(gain) on sales of property and equipment, net	1,080	(27,496)
Allowance for doubtful accounts	(98,479)	57,456
Change in operating assets and liabilities:
Accounts receivable	(425,173)	(1,357,446)
Inventories	(219,103)	(1,379,911)
Prepaid expenses, deposits and other assets	(695,430)	(162,928)
Accounts payable and accrued expenses	(2,972)	1,650,817
Customers' advances	(1,788,386)	372,567
Accrued pension retirement benefits	(1,421,452)	(2,751,787)
Other non-current liabilities	1,098	1,098
Net cash (used in) provided by operating activities	(396,591)	619,328
Cash flows from investing activities
Proceeds from sale of property and equipment	0	33,990
Acquisitions of property and equipment	(678,364)	(918,049)
Purchase of investments	(1,022,266)	(1,010,534)
Proceeds from maturities of investments	1,012,123	497,155
Net cash used in investing activities	(688,507)	(1,397,438)
Cash flows from financing activities
Proceeds from new borrowings	223,454	407,759
Reduction of debt	(470,326)	(385,819)
Exercise of stock options	0	42,800
Payment of dividends	(2,085,556)	(1,934,975)
Purchase of treasury shares	0	(42,800)
Net cash used in financing activities	(2,332,428)	(1,913,035)
Effect of exchange rate changes on cash	10,042	11,572
Net decrease in cash and cash equivalents	(3,407,484)	(2,679,573)
Cash and cash equivalents at February 1	34,581,394	32,400,814
Cash and cash equivalents at April 30	31,173,910	29,721,241
Supplemental disclosure of cash flow information:
Cash paid for interest	85,534	99,046
Cash paid for income taxes	$ 1,311,076	$ 1,074,259