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Note 6 - Leases (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Lessee, Lease, Assets and Liabilities [Table Text Block]
   
March 31, 2020
    
December 31, 2019
  
Right-of-use assets:
                
Finance leases, net, included in Property and equipment
(1)
   $
1,097
     $
1,203
  
Operating leases
    
28,678
      
7,683
  
Total right-of-use assets
   $
29,775
     $
8,886
  
                 
Lease liabilities:
                
Finance leases
   $
1,538
     $
1,641
  
Operating leases
    
27,714
      
7,889
  
Total lease liabilities
   $
29,252
     $
9,530
  
Lease, Cost [Table Text Block]
   
Three Months Ended March 31,
 
   
2020
    
2019
  
Finance lease cost:
                
Amortization of right-of-use assets
   $
105
     $
109
  
Interest on lease liabilities
    
22
      
15
  
Operating lease cost
    
805
      
425
  
Short-term lease cost
    
190
      
262
  
Variable lease cost
    
42
      
40
  
Total lease cost
   $
1,164
     $
851
  
Lessee, Liability, Maturity [Table Text Block]
   
Finance Leases
    
Operating Leases
  
                 
Remainder of 2020
   $
375
     $
2,632
  
2021
    
382
      
2,852
  
2022
    
361
      
2,497
  
2023
    
157
      
2,235
  
2024
    
471
      
2,089
  
Thereafter
    
-
      
25,913
  
Total lease payments
    
1,746
      
38,218
  
Amount representing interest
    
(208
 )    
(10,504
 )
Present value of lease liabilities
    
1,538
      
27,714
  
Current portion of lease liabilities
(1)
    
(402
 )    
(2,450
 )
Lease liabilities, less current portion
(2)
   $
1,136
     $
25,264
  
Lease Terms and Discount Rates for Lease Liabilities [Table Text Block]
   
March 31, 2020
    
December 31, 2019
  
Weighted-average remaining lease term (years)
                
Finance leases
    
3.60
      
3.79
  
Operating leases
    
17.99
      
8.31
  
Weighted-average discount rate
                
Finance leases
    
5.42
%
    
5.40
%
Operating leases
    
3.59
%
    
4.50
%
Other Information Related to Operating and Finance Leases [Table Text Block]
   
Three Months Ended March 31,
 
   
2020
    
2019
  
Cash paid for amounts included in the measurement of lease liabilities:
                
Operating cash flows from finance leases
   $
(22
 )   $
(15
 )
Operating cash flows from operating leases
    
(774
 )    
(415
 )
Financing cash flows from finance leases
    
(103
 )    
(107
 )
Right-of-use assets obtained in exchange for operating lease liabilities
    
-
      
506