Note 7 - Investments, Including Investments Accounted for Using the Equity Method (Tables)
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6 Months Ended |
Jun. 30, 2026 |
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| Notes Tables |
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| Investment [Table Text Block] |
| | | June 30, | | | December 31, | |
| | | 2026 | | | 2025 | |
| | | | | | | | | |
| Common stock warrants of Sky Harbour Group Corporation | | $ | 3,551 | | | $ | 4,988 | |
| | | | | | | | | |
| Total | | $ | 3,551 | | | $ | 4,988 | |
| | | June 30, | | | December 31, | |
| | | 2026 | | | 2025 | |
| | | | | | | | | |
| Investments in special purpose entities | | $ | 18,877 | | | $ | 24,258 | |
| Voting preferred stock of MyBundle.TV Inc. | | | 3,000 | | | | 3,000 | |
| Voting common stock of CB&T Holding Corporation | | | 19,058 | | | | 19,058 | |
| | | | | | | | | |
| Total | | $ | 40,935 | | | $ | 46,316 | |
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| Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
| | | | | | | Gross | | | | | |
| | | | | | | Unrealized | | | Fair | |
| | | Cost | | | Gain (Loss) | | | Value | |
| | | | | | | | | | | | | |
| Marketable equity securities, June 30, 2026 | | $ | 209 | | | $ | (3 | ) | | $ | 206 | |
| | | | | | | | | | | | | |
| Marketable equity securities, December 31, 2025 | | $ | - | | | $ | - | | | $ | - | |
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| Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
| | | | | | | Gross | | | | | |
| | | | | | | Unrealized | | | Fair | |
| | | Cost | | | Gain (Loss) | | | Value | |
| | | | | | | | | | | | | |
| U.S. Treasury trading securities, June 30, 2026 | | $ | 16,397 | | | $ | 44 | | | $ | 16,441 | |
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| U.S. Treasury trading securities, December 31, 2025 | | $ | 20,612 | | | $ | 58 | | | $ | 20,670 | |
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| Investments in and Advances to Affiliates [Table Text Block] |
| | | June 30, | | | December 31, | |
| | | 2026 | | | 2025 | |
| | | | | | | | | |
| Beginning of period | | $ | 74,817 | | | $ | 72,436 | |
| Additional investments in unconsolidated affiliates | | | - | | | | - | |
| Distributions received | | | (124 | ) | | | (60 | ) |
| Transfer of interest | | | - | | | | - | |
| Sale of interest | | | (2,037 | ) | | | (4,104 | ) |
| Equity in (loss) income of unconsolidated affiliates | | | (2,095 | ) | | | 6,545 | |
| | | | | | | | | |
| End of period | | $ | 70,561 | | | $ | 74,817 | |
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| Equity Method Investments [Table Text Block] |
| | | For the Three Months Ended | | | For the Six Months Ended | |
| | | June 30, | | | June 30, | |
| | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| | | | | | | | | | | | | | | | | |
| Revenue | | $ | 11,365 | | | $ | 8,205 | | | $ | 22,362 | | | $ | 14,614 | |
| Gross profit | | | 10,276 | | | | 7,156 | | | | 19,818 | | | | 12,829 | |
| Net loss from operations | | | (6,702 | ) | | | (6,933 | ) | | | (13,192 | ) | | | (13,881 | ) |
| Net (loss) income | | $ | (4,198 | ) | | $ | 14,566 | | | $ | (12,543 | ) | | $ | 5,694 | |
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