Condensed Consolidated Balance Sheets (USD $)	Jan. 31, 2014	Jul. 31, 2013
Assets
Cash and cash equivalents	$ 236,000	$ 32,000
Accounts receivable, net	9,000	18,000
Inventories, net	429,000	365,000
Prepaid expenses	221,000	71,000
Total current assets	895,000	486,000
Property, plant and equipment, net	115,000	146,000
Patents, net	1,403,000	1,430,000
Total assets	2,413,000	2,062,000
Liabilities and stockholders' equity (deficit)
Accounts payable	629,000	1,134,000
Restructuring liability	676,000	0
Note payable, current	0	368,000
Accrued liabilities	154,000	600,000
Derivative liability	54,000	51,000
Total current liabilities	1,513,000	2,153,000
Note payable, less current portion	0	887,000
Deferred rent	10,000	13,000
Total liabilities	1,523,000	3,053,000
Commitments and contingencies
Stockholders' equity (deficit)
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 25,786,461 shares issued and outstanding at January 31, 2014, and 12,569,503 issued and outstanding at July 31, 2013	259,000	126,000
Additional paid-in capital	77,128,000	69,054,000
Accumulated deficit	(76,497,000)	(70,171,000)
Total stockholders' equity (deficit)	890,000	(991,000)
Total liabilities and stockholders' equity (deficit)	$ 2,413,000	$ 2,062,000