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Note 7 - Leases - Lease Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Lease Cost:    
Operating $ 307  
Variable 57  
Short-term 6  
Total lease cost 370  
Operating, cash paid for amounts included in measurement of lease liabilities $ 303  
Operating, weighted average remaining lease term (Year) 3 years 135 days  
Operating, weighted-average discount rate 4.45%  
2019 $ 899  
2020 1,128  
2021 1,119  
2022 957  
2023 35  
Thereafter  
Total lease payments 4,138  
Less: Interest (307)  
Operating Lease, Liability, Total 3,831 $ 4,100
2019 1,051  
2020 1,070  
2021 1,063  
2022 975  
2023 36  
Total $ 4,195