FAIR VALUE MEASUREMENTS (Details Textual) (USD $)	Jul. 31, 2013	Apr. 30, 2013
Notes Payable, Total	$ 28,883,000	$ 20,978,000
Estimate of Fair Value Measurement [Member]
Notes Receivable, Fair Value Disclosure	34,000	35,000
Notes Payable, Fair Value Disclosure	16,496,000	17,000,000
Notes Payable, Total	$ 20,297,000	$ 20,358,000