Consolidated Balance Sheets (USD $)	Oct. 31, 2012	Jul. 31, 2012
Assets
Cash and cash equivalents	$ 2,450,000	$ 877,000
Accounts receivable, net	64,000	373,000
Inventories, net	864,000	654,000
Prepaid expenses	80,000	347,000
Total current assets	3,458,000	2,251,000
Property, plant and equipment, net	226,000	257,000
Patents, net	1,988,000	1,950,000
Total assets	5,672,000	4,458,000
Liabilities and stockholders' equity
Accounts payable	2,094,000	1,946,000
Loan payable, net	0	962,000
Deferred revenue	0	66,000
Accrued liabilities	405,000	344,000
Derivative liability	91,000	319,000
Total current liabilities	2,590,000	3,637,000
Deferred rent	3,000	3,000
Total liabilities	2,593,000	3,640,000
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value: 5,000,000 shares authorized, no shares issued	0	0
Common stock, $0.01 par value: 100,000,000 shares authorized 10,986,170 issued and outstanding at October 31, 2012, and 6,644,555 issued and outstanding at July 31, 2012	110,000	67,000
Additional paid-in capital	67,623,000	63,251,000
Accumulated deficit	(64,654,000)	(62,500,000)
Total stockholders' equity	3,079,000	818,000
Total liabilities and stockholders' equity	$ 5,672,000	$ 4,458,000