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Note 5 - Property And Equipment (Tables)
9 Months Ended
Feb. 28, 2013
Property, Plant and Equipment [Table Text Block]
    February 28, 2013      
May 31, 2012
 
                 
Land
  $
304
    $
301
 
Buildings and improvements
   
2,448
     
2,304
 
Leasehold improvements
   
12,385
     
11,994
 
Capital work-in-progress
   
4,387
     
4,545
 
Furniture and fixtures
   
2,098
     
1,966
 
Machinery, equipment and instruments
   
71,037
     
55,271
 
     
92,659
     
76,381
 
Less accumulated depreciation
   
(28,395
)    
(11,719
)
Property and equipment, net
  $
64,264
    $
64,662