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Note G - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
   
Capital
 
Operating
Year Ending December 31,
 
Leases
 
Leases
2018
  $
242
 
  $
688
 
2019
   
231
 
   
604
 
2020
   
231
 
   
499
 
2021
   
151
 
   
449
 
2022
   
11
 
   
461
 
Thereafter
   
 
   
1,376
 
Total minimum lease payments
   
866
 
  $
4,077
 
Less: amounts representing interest
   
(115
)
   
 
 
Total minimum capital lease principal payments
  $
751