NOTES PAYABLE: (Details) - USD ($) $ in Thousands	Apr. 30, 2015	Apr. 30, 2014
Credit facilities:
Notes Payable	$ 18,090	$ 19,545
Other notes payable [Member]
Credit facilities:
Notes Payable	4,087	4,404
PNC Credit Facility [Member]
Credit facilities:
Notes Payable	0	0
Real estate operations [Member]
Credit facilities:
Notes Payable	$ 14,003	$ 15,141