Note 11 - Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Loss Contingency [Abstract]
Other Accrued Liabilities	$ 300	$ 418
Annual Stop Loss Limit	1,000
Letters of Credit Outstanding, Amount	15,000	15,500
Investments In Escrow For Insurance	223
Accrued Expenses For Estimated Claims Relating To Self Insurance	$ 28,429	$ 24,039