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Receivables, Net
 12 Months Ended
May 31, 2012
Receivables [Abstract]  
Receivables, Net
4. RECEIVABLES, NET
 
Receivables, net, consist of the following at May 31:
 
 
2012
 
2011
Trade accounts
 
$
33,764

 
$
27,562

Refundable income taxes
 
—

 
1,523

Other
 
92

 
37

 
 
33,856

 
29,122

Less allowances for doubtful accounts, sales returns and discounts
 
(4,078
)
 
(1,783
)
Total, net
 
$
29,778

 
$
27,339