Receivables

9 Months Ended

Feb. 29, 2012

Receivables [Abstract]

Receivables

4. RECEIVABLES

A summary of accounts receivable as of February 29, 2012 and May 31, 2011 is as follows (in thousands):

	February 29, 2012			May 31, 2011
	(unaudited)
Trade accounts receivable	$	118,795		$	134,955
Unbilled revenues		19,484			12,387
Allowance for doubtful accounts		(4,402	)		(4,222	)
Total	$	133,877		$	143,120