Note 11 - Derivative Financial Instruments (Tables)

3 Months Ended

Aug. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Interest Rate Derivatives [Table Text Block]

	As of
	August 31, 2015			May 31, 2015
Interest rate swaps (included in other liabilities)	$	(506	)		(686	)

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

	Three Months Ended
	August 31
Location of (loss) gain reclassified from AOCI into income	2015			2014
(Losses) gains on cash flow hedges:
Interest expense (effective portion)	$	(217	)		(261	)
Interest income (expense) (ineffective portion)	$	(1	)		-