Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Revenue:
Product leases and royalties	$ 29,240	$ 26,947	$ 58,592	$ 52,900
Product sales and service	48,174	39,107	77,606	69,207
Total revenue	77,414	66,054	136,198	122,107
Costs and expenses:
Cost of leases and royalties	10,582	9,427	20,454	18,378
Cost of sales and service	16,738	14,138	27,778	25,419
Gross profit	50,094	42,489	87,966	78,310
Selling, general and administrative	23,866	19,804	43,912	36,984
Research and development	9,101	7,925	17,348	15,452
Total costs and expenses	60,287	51,294	109,492	96,233
Income from operations	17,127	14,760	26,706	25,874
Other income (expense):
Interest income	188	174	342	313
Interest expense	(299)	(378)	(523)	(855)
Other, net	315	(146)	270	29
Total other income (expense)	204	(350)	89	(513)
Income from operations before tax	17,331	14,410	26,795	25,361
Income tax provision	5,491	4,675	7,891	7,977
Net income	$ 11,840	$ 9,735	$ 18,904	$ 17,384
Basic earnings per share: (in Dollars per share)	$ 0.21	$ 0.17	$ 0.33	$ 0.31
Diluted earnings per share: (in Dollars per share)	$ 0.21	$ 0.17	$ 0.33	$ 0.31
Weighted average shares outstanding:
Basic (in Shares)	56,984	55,751	56,832	55,408
Diluted (in Shares)	57,721	56,653	57,541	56,154