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Note 10 - Contingencies (Details Textual) - USD ($)
$ in Millions
Mar. 31, 2022
Jul. 31, 2020
Jan. 15, 2020
Jun. 30, 2021
New York City Department of Finance [Member] | State and Local Jurisdiction [Member]        
Income Tax Examination, Penalties and Interest Adjustment Requested   $ 3.0 $ 8.2  
Income Tax Examination, Interest Adjustment Requested   $ 0.7 $ 2.0  
Income Tax Examination, Settlement $ 1.7      
Compliance with New York Executive Law and New York General Business Law [Member]        
Loss Contingency Accrual, Ending Balance       $ 3.7