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Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components - Summary of Aging of Delinquent Loans and Fees Receivable (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Balance of loans greater than 90-days delinquent still accruing interest and fees | $ 2.8 | $ 2.6
Loans at Amortized Cost [Member] |  |
Financing receivable, gross | 118.0 | 118.0
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing receivable, gross | 9.2 | 9.4
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing receivable, gross | 3.8 | 3.4
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing receivable, gross | 4.9 | 3.5
Financial Asset, Past Due [Member] |  |
Financing receivable, gross | 17.9 | 16.3
Financial Asset, Not Past Due [Member] |  |
Financing receivable, gross | $ 100.1 | $ 101.7

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