v3.8.0.1
Note 8 - Liability Related to Sale of Future Royalties (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Other Liabilities [Table Text Block]
   
Year ended
December 31,
201
7
   
Period from

inception to
December 31,
201
7
 
Liability related to sale of future royalties
— beginning balance
  $
72,987
    $
 
Proceeds from sale of future royalties
   
     
61,184
 
Non-cash royalty revenue
   
(120
)
   
(127
)
Non-cash interest expense recognized
   
10,721
     
22,531
 
                 
Liability related to sale of future royalties as of December 31, 2017
   
83,588
     
83,588
 
Less: current portion
   
(604
)
   
(604
)
Liability related to sale of future royalties
— net of current portion
  $
82,984
    $
82,984