Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Operating activities
Net loss	$ (2,820,000)	$ (1,934,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	672,000	503,000
Amortization of stock issued for services	55,000	22,000
Stock issued to investors to amend subscription agreements		131,000
Fair value of derivative liabilities in excess of proceeds	1,008,000
Depreciation and amortization	51,000	51,000
Change in fair value of derivative liability	(43,000)	1,000
Changes in operating assets and liabilities:
Accounts receivable	96,000
Inventories	(12,000)	18,000
Prepaid expenses	(18,000)	(80,000)
Accounts payable and accrued liabilities	(250,000)	(955,000)
Deferred rent	(1,000)	(1,000)
Net cash used in operating activities	(1,262,000)	(2,244,000)
Investing activities
Investment in patents	(4,000)	(4,000)
Net cash used in investing activities	(4,000)	(4,000)
Financing activities
Net proceeds from the sale of common stock	6,000,000	7,493,000
Net cash provided by financing activities	6,000,000	7,493,000
Net increase in cash and cash equivalents	4,734,000	5,245,000
Cash and cash equivalents at beginning of period	1,321,000	1,321,000
Cash and cash equivalents at end of period	6,055,000	$ 5,331,000
Supplemental disclosure of cash flow information
Cash paid for taxes	$ 2,000