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Note 10 - Non-recourse Long-term Debt, Net (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
March 31,
   
December 31,
 
Condensed Consolidated Balance Sheets
 
2020
   
2019
 
Outstanding principal balance, current portion
  $
7,456
    $
7,349
 
Unamortized debt discount, current portion
   
(216
)    
(232
)
Current portion of debt, net
 
$
7,240
   
$
7,117
 
                 
Outstanding principal balance, long-term portion
  $
30,381
    $
32,170
 
Unamortized debt discount, long-term portion
   
(215
)    
(260
)
Long-term debt, net
 
$
30,166
   
$
31,910
 
   
Three Months Ended
 
   
March 31,
 
Condensed Consolidated Statements of Operations
 
2020
   
2019
 
Interest expense
  $
939
    $
1,077
 
Non-cash interest expense
   
61
     
71
 
Total interest expense included in interest (expense) income, net
 
$
1,000
   
$
1,148