Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Operating activities
Net loss	$ (2,339,000)	$ (1,743,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	656,000	278,000
Amortization of stock issued for services	39,000	36,000
Depreciation and amortization	71,000	65,000
Change in fair value of derivative liability	(459,000)	159,000
Inducement to exercise warrants	876,000
Changes in operating assets and liabilities:
Accounts receivable	154,000	117,000
Inventories	(1,000)	2,000
Prepaid expenses	11,000	(108,000)
Accounts payable and accrued liabilities	(38,000)	147,000
Deferred rent	(1,000)
Net cash used in operating activities	(1,031,000)	(1,047,000)
Investing activities
Investment in patents	(3,000)	(7,000)
Purchases of property, plant and equipment	(9,000)	(76,000)
Net cash used in investing activities	(12,000)	(83,000)
Financing activities
Net proceeds from the exercise of warrants	2,632,000
Net cash provided by financing activities	2,632,000	0
Net (decrease) increase in cash and cash equivalents	1,589,000	(1,130,000)
Cash and cash equivalents at beginning of period	1,640,000	5,194,000
Cash and cash equivalents at end of period	3,229,000	4,064,000
Supplemental disclosure of cash flow information
Cash paid for taxes		2,000
Warrant liabilities removed due to settlements	1,394,000
Common stock issued for prepaid services	$ 51,000