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Note 5 - Restructuring and Other Charges (Tables)
3 Months Ended
Mar. 31, 2013
Schedule of Restructuring and Related Costs [Table Text Block]
   
Thermonics
Relocation
 
Balance - January 1, 2012
  $ -  
Accruals for facility closure costs
    359  
Cash payments related to facility closure costs
    (159 )
Balance - March 31, 2012
  $ 200