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Note 5 - Inventories
12 Months Ended
Dec. 31, 2011
Notes To Financial Statements  
Inventory Disclosure [Text Block]
5.   Inventories

Inventories consist of the following (in thousands):

   
December 31,
 
   
2010
   
2011
 
             
Raw materials
  $ 1,319     $ 1,339  
Work-in-progress
    537       800  
Reserve for obsolescence
    (3 )     (3 )
Inventory, net
  $ 1,853     $ 2,136