Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Income Statement [Abstract]
Net product sales	$ 338,000	$ 403,000	$ 1,316,000	$ 765,000
Operating costs and expenses
Cost of goods sold	132,000	116,000	531,000	218,000
Selling, general and administrative	1,302,000	1,385,000	3,972,000	3,857,000
Research and development	222,000	205,000	684,000	679,000
Share-based compensation	275,000	186,000	723,000	1,621,000
Total operating costs and expenses	1,931,000	1,892,000	5,910,000	6,375,000
Loss from operations	(1,593,000)	(1,489,000)	(4,594,000)	(5,610,000)
Other income (expense)
Fair value of derivative liabilities in excess of proceeds				(1,867,000)
Change in derivative liabilities	(147,000)	1,506,000	153,000	(6,241,000)
Interest expense, net	(1,000)	(3,000)	(4,000)	(8,000)
Other income (expense), net	3,000	16,000	28,000	34,000
Total other income (expense)	(145,000)	1,519,000	177,000	(8,082,000)
Net income (loss)	$ (1,738,000)	$ 30,000	$ (4,417,000)	$ (13,692,000)
Net income (loss) per common share-basic	$ (0.03)	$ 0.00	$ (0.07)	$ (0.25)
Net income (loss) per common share-diluted	$ (0.03)	$ (0.02)	$ (0.07)	$ (0.25)
Weighted average shares-basic	62,679,644	61,445,913	63,718,152	54,329,594
Weighted average shares-diluted	62,679,644	71,308,771	63,718,152	54,329,594