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Note 7 - Commitments (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Years Ending December 31,
 
Minimum Lease
Payment
 
 
Sublease
Revenue
 
 
Net
Minimum
Lease
Payment
 
Remainder of 2017
   $
144
     $
(70
)
   $
74
  
2018
    
161
      
(143
)
    
18
  
2019
    
134
      
(147
)
    
(13
)
2020
    
11
      
(12
)
    
(1
)
Total Commitment
   $
450
     $
(372
)
   $
78