Condensed Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
	Jan. 31, 2015	Jan. 31, 2014
Operating activities
Net loss	$ (3,670,000)	$ (6,326,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	985,000	1,421,000
Amortization of stock issued for services	44,000	636,000
Stock issued under severance agreements		825,000
Stock issued to investors to amend subscription agreements		285,000
Fair value of penalty warrants issued		23,000
Gain on extinguishment of debt		(727,000)
Depreciation and amortization	103,000	140,000
Change in fair value of derivative liability	(4,000)	59,000
Changes in operating assets and liabilities:
Accounts receivable	7,000	9,000
Inventories	63,000	(64,000)
Prepaid expenses	(23,000)	(16,000)
Accounts payable and accrued liabilities	(1,008,000)	(275,000)
Deferred rent	(2,000)	(3,000)
Net cash used in operating activities	(3,505,000)	(4,013,000)
Investing activities
Investment in patents	(6,000)	(61,000)
Purchases of property, plant and equipment	(68,000)	(21,000)
Net cash used in investing activities	(74,000)	(82,000)
Financing activities
Net proceeds from the sale of common stock	7,401,000	4,664,000
Net proceeds from the exercise of warrants		163,000
Payment on note payable		(528,000)
Net cash provided by financing activities	7,401,000	4,299,000
Net increase in cash and cash equivalents	3,822,000	204,000
Cash and cash equivalents at beginning of period	86,000	32,000
Cash and cash equivalents at end of period	3,908,000	236,000
Supplemental disclosure of cash flow information
Cash paid for taxes	1,600	4,000
Supplemental disclosure of non-cash investing and financing activities
Common stock issued for prepaid services		175,000
Common stock issued in connection with financing		283,000
Settlement of warrant liability		$ 56,000