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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) | Mar. 31, 2023 | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Number of Gaming Entertainment Properties |  |  | 28 |  |
Number of Reportable Segments |  | 3 | 4 |  |
Interest Costs Capitalized |  |  | $ 3.2 |  | $ 0.1
Debt Instrument, Face Amount |  |  | $ 17.1 |  |
Debt Security Interest Rate Stated Percentage |  |  | 7.50% |  |
Debt Securities, Available-for-Sale |  |  | $ 13.3 | $ 13.7 |
Debt Securities, Available-for-Sale, Current |  |  | 0.7 | 0.7 |
Debt Securities, Available-for-Sale, Noncurrent |  |  | 12.6 | 13.0 |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 35.9 |  | (49.2) |  |
Taxes, Other |  |  | 512.0 | 523.2 | 536.3
Taxes Deposited Pursuant to the Online Collaborative Agreements |  |  | 6.2 | 0.4 |
Advertising Expense |  |  | 22.4 | 18.7 | 16.1
Online [Member] |  |  |  |  |
Taxes Deposited Pursuant to the Online Collaborative Agreements |  |  | $ 328.0 | $ 207.9 | $ 146.7
Customer Relationships [Member] | Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  | 7 years |  |
Customer Relationships [Member] | Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  | 12 years |  |
Host Relationships [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  | 15 years |  |
Development Agreement [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  | 7 years |  |
Developed Technology Rights [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  | 10 years |  |

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