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Note 5 - Leases (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Lease, Cost [Table Text Block]
   
Three Months Ended June 30,
   
Six Months Ended June 30,
 
Lease Cost
 
2019
   
2019
 
Operating lease cost
  $
253
    $
532
 
Finance lease interest cost
   
16
     
33
 
Finance lease amortization expense
   
66
     
131
 
Total lease cost
  $
335
    $
696
 
   
Three Months Ended
June 30
,
 
   
2019
 
Operating leases
 
 
 
 
Cash paid for amounts included in the measurement of lease liabilities
  $
200
 
Right-of-use assets obtained in exchange for lease obligations
  $
 
Weighted-average remaining lease term (years)
       
Operating leases
   
8.1
 
Finance leases
   
3.5
 
Weighted-average discount rate
       
Operating leases
   
4.8
%
Finance leases
   
5.4
%
Schedule of Supplemental Balance Sheet Information Related to Leases [Table Text Block]
 
Balance Sheet Location
 
June 30
, 2019
 
Assets
   
 
 
 
Operating lease assets
Operating lease assets
  $
5,202
 
Finance lease assets
Property, Plant and Equipment
   
1,292
 
Total leased assets
   
6,494
 
           
Liabilities
   
 
 
 
Current
   
 
 
 
           
Current operating lease liabilities
Current Portion of Operating Lease Obligations
   
826
 
           
Current finance lease liabilities
Current Portion of Finance Lease Obligations
   
364
 
Noncurrent
   
 
 
 
Long-term operating lease liabilities
Long Term Operating Lease Liabilities, Net
   
4666
 
Long term finance lease liabilities
Long Term Finance Lease Obligations, Net
   
776
 
Total lease liabilities
  $
6,632
 
Schedule of Lease Liability Maturity [Table Text Block]
   
Operating
Leases
   
Finance Leases
   
Total
 
Remaining 2019
  $
447
    $
213
    $
660
 
2020
   
858
     
398
     
1,256
 
2021
   
722
     
398
     
1,120
 
2022
   
726
     
223
     
949
 
2023
   
738
     
2
     
740
 
Thereafter
   
3,380
     
     
3,380
 
Total lease payments
  $
6,871
    $
1,234
    $
8,105
 
Less: Interest
   
(1,379
)
   
(94
)    
(1,473
)
Present value of lease liabilities
  $
5,492
    $
1,140
    $
6,632
 
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
   
Operating Leases
 
2019
  $
1,024
 
2020
   
858
 
2021
   
722
 
2022
   
726
 
2023
   
738
 
Thereafter
   
3,380
 
Total minimum obligations
  $
7,448