Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
OPERATING ACTIVITIES
Net income (loss)	$ 3,654	$ (3,775)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for deferred income taxes	603	2,673
Depreciation and amortization	5,651	5,390
Share-based compensation expense	2,592	2,735
Excess tax benefit from share-based compensation	(180)	(3,064)
Write-down of inventory to net realizable value	1,213	300
Provision for doubtful accounts, net of recovery	35	(7)
Loss on investment		484
(Gain) loss on sale of property, plant and equipment	(35)	13
Net changes in operating assets and liabilities, exclusive of acquisition related assets and liabilities:
Accounts receivable	19,554	26,599
Inventory	(13,485)	(2,612)
Other current assets	(620)	(606)
Accounts payable	(3,171)	397
Accrued liabilities	(791)	(9,733)
Customer deposits	(81)	21
Deferred revenue	(1,884)	1,475
Accrued income taxes	627	(10,126)
Other liabilities	328	492
NET CASH FLOWS PROVIDED BY OPERATING ACTIVITIES	14,010	10,656
INVESTING ACTIVITIES
Additions to property, plant, and equipment	(2,665)	(4,163)
Acquisition of business, net of cash acquired	(1,600)	(10,561)
Purchases of marketable securities in Rabbi Trust under the Non Qualified Deferred Compensation Plan	(200)
Proceeds from the sale of property, plant, and equipment	127	45
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(4,338)	(14,679)
FINANCING ACTIVITIES
Issuance of stock pursuant to exercise of stock options, employee stock purchase plan, restricted stock plans, and non-employee director stock plan	152	3,848
Shares repurchased for taxes for vested employee restricted stock grants	(1,605)	(6,085)
Excess tax benefit from share-based compensation	180	3,064
Repurchase of common stock	(3,682)	(3,731)
Dividends paid to shareholders	(1,384)	(1,243)
NET CASH FLOWS USED IN FINANCING ACTIVITIES	(6,339)	(4,147)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(1,430)	213
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1,903	(7,957)
CASH AND CASH EQUIVALENTS, BEGINNING OF THE PERIOD	114,540	113,033
CASH AND CASH EQUIVALENTS, END OF THE PERIOD	$ 116,443	$ 105,076