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Note 1 - Basis of Presentation - Components of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Cash and Cash Equivalents $ 11,186 $ 7,290 $ 5,568  
Restricted Cash included in Other Assets 134 134 134  
Cash, Cash Equivalents and Restricted Cash in the Condensed Consolidated Statement of Cash Flows $ 11,320 $ 7,424 $ 5,702 $ 15,816