Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Jul. 31, 2012
OPERATING ACTIVITIES:
Net income	$ 4,381	$ 4,026
Adjustments to reconcile net income to net cash (used for) provided by operating activities
Benefit from deferred income taxes	6,500	2,017
Depreciation and amortization	3,999	4,794
Share-based compensation expense	2,644	2,251
Excess tax provision for share-based compensation	(1,853)	45
Other	732	323
Net changes in operating assets and liabilities:
Accounts receivable	18,397	3,186
Inventories	(14,056)	(4,739)
Refundable income taxes	(5,870)
Other current assets	(1,317)	(144)
Accounts payable	(1,330)	(2,062)
Accrued liabilities	(12,037)	(7,612)
Advance payments and deferred revenue	(3,865)	371
Accrued income taxes	(3,489)	(742)
Other liabilities	423	179
Total net changes in operating assets and liabilities:	(23,144)	(11,563)
NET CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	(6,741)	1,893
INVESTING ACTIVITIES:
Additions to property, plant, and equipment	(5,609)	(6,815)
NET CASH USED FOR INVESTING ACTIVITIES	(5,609)	(6,815)
FINANCING ACTIVITIES:
Issuance of stock pursuant to exercise of stock options, employee stock purchase plan, restricted stock plans, and non-employee director stock plan	3,059	308
Shares repurchased for taxes for vested employee restricted stock awards	(3,784)	(328)
Excess tax provision for share-based compensation	1,853	(45)
Purchase of common stock	(3,937)	(11,808)
Dividends paid to shareholders	(1,443)	(1,337)
NET CASH USED FOR FINANCING ACTIVITIES	(4,252)	(13,210)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	529	(418)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(16,073)	(18,550)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	187,011	169,656	169,656
CASH AND CASH EQUIVALENTS, END OF PERIOD	170,938	151,106	187,011
Supplemental disclosure of non-cash investing activities from continuing operations were as follows
Accrued milestone payments towards the construction of a manufacturing facility in Shanghai, China, and State College, PA	1,696		1,755
Other property, plant, and equipment that was included in accounts payable	$ 835