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Note 4 - Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Table Text Block]
   
December 31,
 
   
2012
   
2011
 
Equipment (useful life 3 - 15 years)
  $ 5,963     $ 5,831  
Tooling (useful life 2 - 5 years)
    2,600       2,440  
Furniture and fixtures (useful life 5 years)
    132       129  
Computer software (useful life 3 years)
    462       431  
Leasehold improvements (the shorter of useful life or lease life)
    633       630  
Construction in progress
    50       27  
Property and equipment at cost
    9,840       9,488  
Less: accumulated depreciation
    (8,040 )     (7,383 )
Property and equipment, net
  $ 1,800     $ 2,105