Note 12 - Deferred Revenue (Tables)

12 Months Ended

May. 31, 2015

Deferred Revenue Disclosure [Abstract]

Deferred Revenue, by Arrangement, Disclosure [Table Text Block]

	Year Ended May 31
	2015			2014
Balance at beginning of year	$	2,899			2,413
Additions to deferred revenue from new contracts		9,388			8,658
Revenue recognized during the year		(9,293	)		(8,246	)
Foreign currency translation adjustment		(228	)		74
Balance at end of year		2,766			2,899
Less current portion		(2,703	)		(2,813	)
Deferred revenue, net of current portion	$	63			86