SEGMENT REPORTING (Details Textual) (USD $)	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Specialty Communication [Member] | China Operations [Member]
Segment Reporting Information, Revenue for Reportable Segment	$ 5,258,000	$ 6,094,000
Segment Reporting Information, Net Assets	198,000	898,000
Noncontrolling Interest, Ownership Percentage by Parent	60.00%	60.00%
Wireless Communication [Member] | Australia Operations [Member]
Segment Reporting Information, Revenue for Reportable Segment	7,660,000	12,290,000
Segment Reporting Information, Net Assets	$ (308,000)	$ 3,100,000