NOTES PAYABLE: (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2012
Credit facilities:
Notes Payable	$ 20,978	$ 21,325
Notes Payable, Other Payables [Member]
Credit facilities:
Notes Payable	4,351	4,486
Line of Credit [Member] | Media Services [Member]
Credit facilities:
Notes Payable	620	0
Line of Credit [Member] | Real Estate Operations and Corporate [Member]
Credit facilities:
Notes Payable	$ 16,007	$ 16,839