Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Revenue:
Product leases and royalties	$ 24,785	$ 22,043	$ 72,625	$ 64,013
Product sales and service	33,542	29,504	89,400	78,686
Total revenue	58,327	51,547	162,025	142,699
Costs and expenses:
Cost of leases and royalties	8,970	6,932	24,506	20,394
Cost of sales and service	13,135	12,948	36,035	33,492
Gross profit	36,222	31,667	101,484	88,813
Selling, general and administrative	16,816	17,514	50,077	47,573
Research and development	6,695	5,719	19,494	15,925
Total costs and expenses	45,616	43,113	130,112	117,384
Income from operations	12,711	8,434	31,913	25,315
Other income (expense):
Interest income	177	158	429	450
Interest expense	(659)	(1,023)	(2,031)	(3,039)
Other, net	457	385	(504)	1,512
Total other income (expense)	(25)	(480)	(2,106)	(1,077)
Income before income taxes	12,686	7,954	29,807	24,238
Income tax provision	3,560	2,112	7,931	6,832
Net income	$ 9,126	$ 5,842	$ 21,876	$ 17,406
Basic earnings per share: (in Dollars per share)	$ 0.17	$ 0.11	$ 0.40	$ 0.33
Diluted earnings per share: (in Dollars per share)	$ 0.17	$ 0.11	$ 0.40	$ 0.32
Weighted average shares outstanding:
Basic (in Shares)	54,446	53,272	54,317	53,246
Diluted (in Shares)	55,123	54,351	55,009	54,178