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Note 10 - Leases (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Lease, Cost [Table Text Block]
    Three Months Ended   Three Months Ended
    March 31, 2020   March 31, 2019
      (in thousands)       (in thousands)  
Operating lease cost   $
535
     $
523
  
Short term lease cost    
42
      
76
  
Sublease income    
(107
 )    
(102
 )
Total lease cost   $
470
     $
497
  
Supplemental Cash Flow Information Related to Operating Leases [Table Text Block]
    Three Months Ended   Three Months Ended
    March 31, 2020   March 31, 2019
      (in thousands)       (in thousands)  
Cash paid for amounts included in the measurement
of lease liabilities:		   $
687
     $
702
  
Supplemental Balance Sheet Informaton Related to Operating Leases [Table Text Block]
    March 31, 2020   December 31, 2019
      (in thousands)       (in thousands)  
Operating lease right-of use assets   $
8,127
     $
8,463
  
                 
Current portion, operating lease liabilities   $
2,297
     $
2,424
  
Operating lease liabilities, long term    
7,867
      
8,224
  
Total operating lease liabilities   $
10,164
     $
10,648
  
                 
Weighted average remaining lease term (in years)    
8.0
      
8.1
  
Weighted average discount rate    
9.2
 %    
9.2
 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
    Operating
    Leases
    (in thousands)
2021   $
2,297
  
2022    
1,905
  
2023    
1,842
  
2024    
1,827
  
2025    
1,367
  
Thereafter    
5,574
  
Total lease payments    
14,812
  
Less interest    
(4,648
 )
Total operating lease liabilities   $
10,164