Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
REVENUE
Products	$ 4,808	$ 5,025
Services	926	1,205
Net revenue	5,734	6,230
COST OF REVENUE
Products	3,747	3,897
Services	472	605
Cost of revenue	4,219	4,502
Gross profit	1,515	1,728
OPERATING EXPENSE
Selling, general and administrative	1,292	1,275
Research and development	109	108
Other operating expense (income), net	14	(9)
Total operating expense	1,415	1,374
Income from operations	100	354
OTHER INCOME
Interest income, net	42	12
Total other income	42	12
Income before income taxes	142	366
Income tax expense	7	8
Net income	135	358
Less: Net income attributable to noncontrolling interest	47	12
Net income attributable to common shareholders	88	346
COMPREHENSIVE INCOME
Net income	88	346
Realized gains on available-for-sale securities		5
Comprehensive income	$ 88	$ 351
Weighted average shares outstanding
Basic	2,877	2,868
Diluted	2,877	2,868
Basic income per share	$ 0.03	$ 0.12
Diluted income per share	$ 0.03	$ 0.12