Condensed Consolidated Statements Of Operations And Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
REVENUE
Products	$ 5,025	$ 4,676
Services	1,205	1,153
Net revenue	6,230	5,829
COST OF REVENUE
Products	3,897	3,517
Services	605	603
Cost of revenue	4,502	4,120
Gross profit	1,728	1,709
OPERATING EXPENSE
Selling, general and administrative	1,275	1,486
Research and development	108	133
Other operating expense (income), net	(9)	33
Total operating expense	1,374	1,652
Income from operations	354	57
OTHER INCOME (EXPENSE)
Interest income (expense), net	12	(158)
Total other income (expense)	12	(158)
Income (loss) before income taxes and discontinued operations	366	(101)
Income tax expense	8
Net income (loss) from continuing operations	358	(101)
DISCONTINUED OPERATIONS
Loss from discontinued operations		(181)
Net income (loss)	358	(282)
Less: Net income (loss) attributable to noncontrolling interest	12	(35)
Net income (loss) attributable to common shareholders	346	(247)
COMPREHENSIVE INCOME (LOSS)
Net income (loss)	346	(247)
Realized gains on available-for-sale securities	5
Foreign currency translation adjustment		2
Comprehensive income (loss)	$ 351	$ (245)
Weighted average shares outstanding
Basic	2,868	2,855
Diluted	2,868	2,855
Basic income (loss) per share:
From continuing operations	$ 0.12	$ (0.03)
From discontinued operations		$ (0.06)
Basic income (loss) per share	$ 0.12	$ (0.09)
Diluted income (loss) per share:
From continuing operations	$ 0.12	$ (0.03)
From discontinued operations		$ (0.06)
Diluted income (loss) per share	$ 0.12	$ (0.09)