IMPAIRMENT OF ASSETS: (Details Textual) (USD $)	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Original Value Of Impaired Real Estate	$ 4,949,000	$ 1,734,000	$ 12,172,000
Fair Value Of Impaired Real Estate	3,466,000	1,174,000	7,022,000
Impairment of Real Estate	1,511,000	570,000	5,209,000
Mortagage Loans Impairment Loss			450,000
Receivable with Imputed Interest, Face Amount			901,000
Goodwill, Impairment Loss Recorded			3,893,000
Non-deductible goodwill impairment (see Note 14)	0	0	1,363,000
Real Estate Colorado [Member]
Original Value Of Impaired Real Estate			4,133,000
Fair Value Of Impaired Real Estate			3,010,000
Impairment of Real Estate			$ 1,168,000