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Note 4 - Financing Arrangements (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
June 30,
   
December 31,
 
   
2019
   
2018
 
Real estate term notes bearing interest at one-month LIBOR + 2.25% (4.8% as of June 30, 2019 and December 31, 2018) maturing June 15, 2022 with monthly payments of approximately $41 plus interest secured by substantially all assets.
  $
4,004
    $
4,253
 
                 
China letter of credit arrangement
   
437
     
-
 
                 
Devicix Acquistion Note 1 payable to DeLange Holdings bears interest rate of 4.0% per annum, maturing July 1, 2019
   
-
     
156
 
                 
Devicix Acquistion Note 2 payable to DeLange Holdings bears interest rate of 4.0% per annum, maturing July 1, 2019
   
-
     
203
 
     
4,441
     
4,612
 
                 
Discount on Devicix Notes Payable
   
-
     
(23
)
Debt issuance Costs
   
(162
)    
(185
)
                 
Total long-term debt
   
4,279
     
4,404
 
Current maturities of long-term debt
   
(878
)    
(780
)
Long-term debt - net of current maturities
  $
3,401
    $
3,624