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Note 5 - Lease Obligations and Other Contingencies (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
2019   $
1,300
 
2020    
934
 
2021    
524
 
2022    
491
 
2023    
503
 
Thereafter    
1,495
 
Total minimum payments   $
5,247