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Note 8 - Commitments and Contingencies (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Mar. 31, 2022
Litigation Settlement, Expense $ 2,700  
Financing Receivable Deferred Payments   $ 600
Obligated to Provide Parking [Member]    
Other Commitment, Total   $ 205