Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Cash Flows from Operating Activities
Net income	$ 768	$ 935
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	309	266
Amortization	248	180
Provision for doubtful accounts receivable	0	56
Stock-based compensation	188	184
Deferred income taxes	0	92
(Increase) decrease in:
Accounts receivable	2,315	1,629
Inventories	(123)	(1,152)
Prepaid expenses	(1)	(236)
Increase (decrease) in:
Accounts payable	764	(135)
Accrued expenses	1,055	(267)
Deferred revenue	(322)	(322)
Income taxes payable	39	300
Net cash provided by operating activities	5,240	1,530
Cash Flows from Investing Activities
Purchase of property and equipment	(178)	(302)
Acquisition of patents and other intangibles	(15)	(82)
Net cash used in investing activities	(193)	(384)
Cash Flows from Financing Activities
Proceeds from the issuance of common stock	28	0
Tax benefit associated with the exercise of non-qualified stock options	16	0
Net cash provided by financing activities	44	0
Foreign exchange rate effect on cash and cash equivalents	(94)	(79)
Net increase in cash and cash equivalents	4,997	1,067
Cash and cash equivalents
Beginning	15,443	12,470
Ending	$ 20,440	$ 13,537