Balance Sheet Details

12 Months Ended

Jul. 31, 2012

Balance Sheet Related Disclosures [Abstract]

3. Balance Sheet Details

Inventories consist of the following:



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

Property, plant, and equipment consist of the following:



	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

Depreciation expense was $179,000 and $285,000 for the years ended July 31, 2012 and 2011, respectively.

Patents consist of the following:



	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

Patent amortization expense was $206,000 and $186,000 for the years ended July 31, 2012 and 2011, respectively. At July 31, 2012, the weighted average remaining amortization period for all patents was approximately ten years. The annual patent amortization expense for the next five years is estimated to be approximately $226,000 per year.