Balance Sheet Details (Tables)

12 Months Ended

Jul. 31, 2012

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventory, Current [Table Text Block]

	July 31,
	2012		2011
Raw materials	$	476,000	$	498,000
Finished goods		178,000		363,000
	$	654,000	$	861,000

Property, Plant and Equipment [Table Text Block]

	July 31,
	2012		2011
Computers and equipment	$	909,000	$	899,000
Furniture and fixtures		21,000		21,000
Leasehold improvements		622,000		622,000
		1,552,000		1,542,000
Less accumulated depreciation		(1,295,000)		(1,116,000)
	$	257,000	$	426,000

Patents [Table Text Block]

	July 31,
	2012		2011
Patents	$	3,773,000	$	3,534,000
Less accumulated amortization		(1,823,000)		(1,617,000)
	$	1,950,000	$	1,917,000