FAIR VALUE MEASURMENTS (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of credit	$ 1,377	$ 462
Long term debt and capital lease obligations	14,706	12,435
Liabilities, fair value disclosure	16,083	12,897
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of credit	0	0
Long term debt and capital lease obligations	0	0
Liabilities, fair value disclosure	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of credit	1,377	462
Long term debt and capital lease obligations	14,706	12,435
Liabilities, fair value disclosure	16,083	12,897
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of credit	0	0
Long term debt and capital lease obligations	0	0
Liabilities, fair value disclosure	$ 0	$ 0