Note 10 - Derivative Financial Instruments (Tables)

9 Months Ended

Feb. 28, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Interest Rate Derivatives [Table Text Block]

	As of
	February 28, 2014			May 31, 2013
Interest rate swaps (included in other liabilities)	$	(1,516	)		(1,906	)

Derivative Instruments, Gain (Loss) [Table Text Block]

	Three Months Ended						Nine Months Ended
	February 28						February 28
Location of loss reclassified from AOCI into income	2014			2013			2014			2013
Losses on cash flow hedges:
Interest expense (effective portion)	$	(243	)		(245	)		(746	)		(763	)
Interest expense (ineffective portion)	$	(1	)		(2	)		(9	)		(9	)