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Note 10 - Contingencies (Details Textual) - New York City Department of Finance [Member] - State and Local Jurisdiction [Member]
$ in Millions
Jan. 15, 2020
USD ($)
Income Tax Examination, Penalties and Interest Adjustment Requested $ 8.2
Income Tax Examination, Interest Adjustment Requested 2.0
Minimum [Member]  
Income Tax Examination, Estimate of Possible Loss 0.7
Maximum [Member]  
Income Tax Examination, Estimate of Possible Loss $ 3.7