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Note 5 - Intangible Assets - Components of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Intangible assets, gross $ 1,067 $ 1,067
Accumulated amortization (239) (34)
Net carrying value 828 1,033
Customer Relationships [Member]    
Intangible assets, gross 626 626
Intellectual Property [Member]    
Intangible assets, gross $ 441 $ 441