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Note 5 - Cash, Cash Equivalents and Restricted Cash - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash and cash equivalents $ 3,254 $ 4,210  
Restricted cash 1,696 3,885  
Total cash, cash equivalents and restricted cash $ 4,950 $ 8,095 $ 8,631