Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Revenue:
Product leases and royalties	$ 27,830	$ 24,785	$ 80,730	$ 72,625
Product sales and service	35,556	33,542	104,763	89,400
Total revenue	63,386	58,327	185,493	162,025
Costs and expenses:
Cost of leases and royalties	9,475	8,970	27,853	24,506
Cost of sales and service	13,889	13,135	39,308	36,035
Gross profit	40,022	36,222	118,332	101,484
Selling, general and administrative	19,007	16,816	55,991	50,077
Research and development	7,622	6,695	23,074	19,494
Total costs and expenses	49,993	45,616	146,226	130,112
Income from operations	13,393	12,711	39,267	31,913
Other income (expense):
Interest income	116	177	429	429
Interest expense	(367)	(659)	(1,222)	(2,031)
Other, net	180	457	209	(504)
Total other income (expense)	(71)	(25)	(584)	(2,106)
Income before income taxes	13,322	12,686	38,683	29,807
Income tax provision	2,898	3,560	10,875	7,931
Net income	$ 10,424	$ 9,126	$ 27,808	$ 21,876
Basic earnings per share: (in Dollars per share)	$ 0.19	$ 0.17	$ 0.50	$ 0.40
Diluted earnings per share: (in Dollars per share)	$ 0.18	$ 0.17	$ 0.49	$ 0.40
Weighted average shares outstanding:
Basic (in Shares)	56,284	54,446	55,700	54,317
Diluted (in Shares)	57,029	55,123	56,445	55,009