11. SUBSEQUENT EVENTS (Details Narrative) - Common Stock [Member] - USD ($)	1 Months Ended	6 Months Ended
	Dec. 12, 2016	Oct. 31, 2016	Oct. 31, 2015
Proceeds from issuance of stock		$ 5,966,000
Commissions and other issuance costs		185,000	$ 444,000
Equity Distribution Agreement [Member]
Proceeds from issuance of stock		$ 2,516,000
Shares issued, new		5,637,404
Commissions and other issuance costs		$ 77,000
Remaining Aggregate Gross Proceeds Available Under Agreement		$ 10,515,000
Subsequent Event [Member]
Proceeds from issuance of stock	$ 1,670,000
Subsequent Event [Member] | AMI Sales Agreement [Member]
Proceeds from issuance of stock	$ 1,174,000
Shares issued, new	3,788,346
Remaining Aggregate Gross Proceeds Available Under Agreement	$ 17,929,000
Subsequent Event [Member] | Equity Distribution Agreement [Member]
Proceeds from issuance of stock	$ 496,000
Shares issued, new	1,587,909
Remaining Aggregate Gross Proceeds Available Under Agreement	$ 10,019,000