Condensed Consolidated Statements Of Operations (USD $)	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Condensed Consolidated Statements Of Operations [Abstract]
Net product sales	$ 117,000	$ 115,000
Operating costs and expenses
Cost of goods sold	45,000	36,000
Selling, general and administrative	1,192,000	925,000
Research and development	176,000	213,000
Share-based compensation	503,000	89,000
Other share-based expenses	131,000
Restructuring costs		2,684,000
Total operating costs and expenses	2,047,000	3,947,000
Loss from operations	(1,930,000)	(3,832,000)
Other income (expense)
Change in derivative liability	(1,000)	(58,000)
Interest expense, net	(2,000)	(3,000)
Other income (expense), net	(1,000)	49,000
Total other income (expense)	(4,000)	(12,000)
Net loss	$ (1,934,000)	$ (3,844,000)
Basic and diluted net loss per share	$ (0.05)	$ (0.19)
Shares used in computing basic and diluted net loss per share	37,029,203	20,701,547