v3.8.0.1
Note 10 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Year Ending December
31:
       
201
8
  $
959
 
2019
   
1,231
 
2020
   
1,268
 
2021
   
1,305
 
2022
   
1,345
 
Thereafter
   
1,501
 
Total minimum payments
  $
7,609