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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)	1 Months Ended		6 Months Ended		12 Months Ended
	Dec. 12, 2016	Sep. 08, 2016	Oct. 31, 2016	Oct. 31, 2015	Apr. 30, 2015	Apr. 30, 2016
Cash and cash equivalents			$ 49,055,000	$ 72,005,000	$ 68,001,000	$ 61,412,000
Restricted cash pledged as collateral for letters of credit			600,000			$ 600,000
Asset impairment charges			$ 0	$ 0
Subsequent Event [Member]
Amount remaining under shelf registration statements	$ 105,345,000
Accounts Receivable [Member] \| Four Customers [Member]
Concentration percentage			98.00%		98.00%
Common Stock [Member]
Gross proceeds from issuance of equity			$ 5,966,000
Common Stock [Member] \| Subsequent Event [Member]
Gross proceeds from issuance of equity	$ 1,670,000
Series E Preferred Stock [Member]
Gross proceeds from issuance of equity		$ 1,634,000