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Note 10 - Contingencies (Details Textual) - USD ($) $ in Millions | Jul. 31, 2020 | Jan. 15, 2020 | Sep. 30, 2021
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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 |
New York City Department of Finance [Member] | State and Local Jurisdiction [Member] | Minimum [Member] |  |  |
Income Tax Examination, Estimate of Possible Loss | 0.8 |  |
New York City Department of Finance [Member] | State and Local Jurisdiction [Member] | Maximum [Member] |  |  |
Income Tax Examination, Estimate of Possible Loss | $ 3.0 |  |
Compliance with New York Executive Law and New York General Business Law [Member] |  |  |
Loss Contingency Accrual, Ending Balance |  |  | $ 3.7

X
- Definition The amount of requested interest adjustment in the period arising from income tax examinations. + References No definition available. + Details
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- Definition The sum of the amounts of requested penalties and interest adjustment in the period arising from income tax examinations. + References No definition available. + Details
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- Definition Estimated amount of loss resulting from an adverse tax position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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