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Note 4 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Year Ending December 31,
 
 
 
 
2017
  $
1,914
 
2018
   
1,299
 
2019
   
436
 
2020
   
372
 
2021
   
198
 
2022 and thereafter
   
72
 
Total future minimum lease payments
  $
4,291