SHAREHOLDERS' EQUITY: (Details Textual) - USD ($)	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (268,000)	$ (1,658,000)
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, New Issues	825,000	825,000
Stock Issued During Period, Value, New Issues	$ 4,274,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 0	$ 0
Common Stock [Member] | Kable Distribution and Palm Coast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Value, New Issues		83,000
Additional Paid-in Capital [Member] | Kable Distribution and Palm Coast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Value, New Issues		$ 4,191,000