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v3.24.1

Note 5 - Investments (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($)
Investment Owned, Fair Value | $ 22 | $ 16,585
Proceeds from Sale and Maturity of Marketable Securities | 16,947 | 2,058
Marketable Security, Realized Gain (Loss) | $ (4,316) | $ (22,868)
Iron Net [Member] | Discontinued Operations, Disposed of by Sale [Member] |  |
Investment Owned, Balance, Shares (in shares) | shares | 198,250 |
GAMCO Investors, Inc. [Member] | Discontinued Operations, Disposed of by Sale [Member] |  |
Proceeds from Sale and Maturity of Marketable Securities | $ 16,886 |
Marketable Security, Realized Gain (Loss) | $ 370 |
GAMCO Investors, Inc. [Member] |  |
Number of Mutual Fund Investments | 0 | 2
Iron Net [Member] |  |
Investment Owned, Cost | $ 46 |
Investment Owned, Fair Value | $ 4,273 |

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