Income Taxes (Tables)

12 Months Ended

Jul. 31, 2012

Income Tax Disclosure [Abstract]

Income Tax Expenses Benefit

	2012		2011
Current
Federal	$	—	$	—
State		20		54
		20		54
Deferred
Federal		—		—
State		—		—
		—		—
	$	20	$	54

Reconciliation

	2012			2011
Income tax expense (benefit) at federal statutory rate (35%)	$	162		$	(470	)
State income taxes		13			35
Change in valuation allowance		(160	)		457
Other, net		5			32
Total income tax expense	$	20		$	54

Deferred Tax Effects

	2012			2011
Allowance for doubtful receivables	$	177		$	192
Inventories		858			898
Basis difference in property and equipment		(5	)		(6	)
Intangible assets		—			—
Accrued warranty costs		50			47
Accrued expenses and other		115			135
Deferred revenue		(42	)		(75	)
Net operating loss carry-forwards		9,663			9,785
Valuation allowance		(10,816	)		(10,976	)
Total deferred tax asset	$	—		$	—