CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands	9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 5,746	$ 3,396
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	880	935
Amortization of intangible assets	570	591
Amortization of investment premium, net	986	1,213
Stock-based compensation	918	1,112
Tax benefit from stock option exercises	(457)	(210)
Deferred income taxes	(16)	124
Loss on disposition of property, plant and equipment	25	192
Change in operating assets and liabilities:
Accounts receivable	(1,783)	(1,530)
Inventories	70	(1,522)
Other current assets	(24)	(85)
Accounts payable	2	(797)
Accrued expenses	(545)	(27)
Net cash provided by operating activities	6,372	3,392
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(1,743)	(742)
Investments in patents, trademarks and licenses	(239)	(71)
Purchases of investments	(43,511)	(67,085)
Proceeds from the maturity or sale of investments	40,908	59,658
Net cash used in investing activities	(4,585)	(8,240)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds related to stock-based compensation plans	3,137	1,262
Repurchase of the Company's common stock	(126)	(2,552)
Excess tax benefit from stock option exercises	457	210
Net cash provided by (used in) financing activities	3,468	(1,080)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	5,255	(5,928)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	12,951	15,863
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 18,206	$ 9,935