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Note 5 - Lease Obligations and Other Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
2017   $
871
 
2018    
838
 
2019    
822
 
2020    
653
 
2021    
478
 
Thereafter    
2,489
 
Total minimum payments   $
6,151