Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Condensed Consolidated Statements of Operations [Abstract]
Net product sales	$ 186,000	$ 117,000
Operating costs and expenses
Cost of goods sold	54,000	45,000
Selling, general and administrative	1,086,000	1,192,000
Research and development	236,000	176,000
Share-based compensation	672,000	503,000
Other share-based expenses		131,000
Total operating costs and expenses	2,048,000	2,047,000
Loss from operations	(1,862,000)	(1,930,000)
Other income (expense)
Fair value of derivative liabilities in excess of proceeds	(1,008,000)
Change in derivative liability	43,000	(1,000)
Interest expense, net	(2,000)	(2,000)
Other income (expense), net	9,000	(1,000)
Total other income (expense)	(958,000)	(4,000)
Net loss	$ (2,820,000)	$ (1,934,000)
Basic and diluted net loss per share	$ (0.07)	$ (0.05)
Shares used in computing basic and diluted net loss per share	43,019,329	37,029,203