v3.8.0.1
Note 7 - Long-term Debt (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Maturities of Long-term Debt [Table Text Block]
20
18
   $
9,350
  
2019
    
9,350
  
20
20
    
3,704
  
Total payments
    
22,404
  
Less amount representing interest
    
(2,420
)
Notes payable, gross
    
19,984
  
Unamortized portion of final payment
    
(741
)
Unamortized discount on notes payable
    
(147
)
Long-term debt    
19,096
  
Less current portion of notes payable, including unamortized discount
    
(7,727
)
Long-term debt,
current portion
   $
11,369