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Note 6 - Capital Lease Obligations - Maturities of Outstanding Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
[1]
December 31, 2018 $ 446  
December 31, 2019 1,137  
December 31, 2020 538  
December 31, 2021 12  
Total capital lease obligations 2,133  
Current portion (1,392) $ (1,416)
Non-current portion of capital lease obligations $ 741 $ 1,687
[1] Derived from the Company's audited consolidated financial statements as of December 31, 2017.