STOCKHOLDERS' EQUITY (Details Textual) - USD ($)	1 Months Ended	9 Months Ended
	Dec. 21, 2016	Jan. 31, 2017	Apr. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Par or Stated Value Per Share		$ 0.0001	$ 0.0001
Series H Convertible Preferred Stock [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Conversion of Units		263,000
Series H Convertible Preferred Stock [Member] | Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Conversion of Units		2,630
Series H-1 Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends		$ 378,000
Series H-1 Preferred Stock [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Conversion of Units		383,000
Series H-1 Preferred Stock [Member] | Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Conversion of Units		(3,830)
Series H-2 Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value Of Warrants		$ 462,000
Fair Value Of Convertible Preferred Stock		$ 231,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		5 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate		238.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		2.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Proceeds from Issuance of Warrants	$ 462,000
Series H-2 Convertible Preferred Stock [Member] | Securities Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 0.0001
Number Shares To Be Issued	3,305
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	495,750
Series H-2 Convertible Preferred Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	1.21
Series H-2 Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt Instrument, Convertible, Conversion Price		$ 0.60
Debt Instrument, Convertible, Beneficial Conversion Feature		$ 183,000