Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Cash Flows from Operating Activities
Net income	$ (30)	$ 2,638
Plus: Loss from discontinued operations - net of tax	0	382
Income from continuing operations	(30)	3,020
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	542	570
Amortization	317	324
Provision for doubtful accounts receivable	31	0
Stock-based compensation	456	275
Deferred income taxes	(426)	221
(Increases) decreases in:
Accounts receivable	781	617
Inventories	591	(1,361)
Prepaid expenses	(297)	(258)
Income taxes refundable	(1,161)	(31)
(Decrease) increase in:
Accounts payable	(256)	804
Accrued expenses	(384)	(428)
Deferred revenue	(644)	(851)
Income taxes payable	(191)	(6,039)
Net cash used in continuing operating activities	(671)	(3,137)
Net cash provided by discontinued operations	0	34
Net cash used in operating activities	(671)	(3,103)
Cash Flows from Investing Activities
Purchase of property and equipment	(301)	(983)
Acquisition of patents and other intangibles	(115)	(162)
Net cash used in continuing investing activities	(416)	(1,145)
Cash Flows from Financing Activities
Payment on debt incurred for acquisition of trademark	0	(313)
Tax benefit associated with the exercise of non-qualified stock options	72	8
Proceeds from the issuance of common stock	88	5
Net cash used in financing activities	160	(300)
Foreign exchange rate effect on cash and cash equivalents	(69)	79
Net decrease in cash and cash equivalents	(996)	(4,469)
Cash and cash equivalents
Beginning	12,680	18,399
Ending	$ 11,684	$ 13,930