Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Revenue:
Product leases and royalties	$ 26,947	$ 24,264	$ 52,900	$ 47,840
Product sales and service	39,107	35,619	69,207	55,858
Total revenue	66,054	59,883	122,107	103,698
Costs and expenses:
Cost of leases and royalties	9,427	8,354	18,378	15,536
Cost of sales and service	14,138	15,435	25,419	22,900
Gross profit	42,489	36,094	78,310	65,262
Selling, general and administrative	19,804	17,060	36,984	33,261
Research and development	7,925	6,883	15,452	12,799
Total costs and expenses	51,294	47,732	96,233	84,496
Income from operations	14,760	12,151	25,874	19,202
Other income (expense):
Interest income	174	126	313	252
Interest expense	(378)	(671)	(855)	(1,372)
Other, net	(146)	(1,118)	29	(961)
Total other income (expense)	(350)	(1,663)	(513)	(2,081)
Income before income taxes	14,410	10,488	25,361	17,121
Income tax provision	4,675	2,542	7,977	4,371
Net income	$ 9,735	$ 7,946	$ 17,384	$ 12,750
Basic earnings per share: (in Dollars per share)	$ 0.17	$ 0.15	$ 0.31	$ 0.24
Diluted earnings per share: (in Dollars per share)	$ 0.17	$ 0.14	$ 0.31	$ 0.23
Weighted average shares outstanding:
Basic (in Shares)	55,751	54,374	55,408	54,253
Diluted (in Shares)	56,653	55,010	56,154	54,953