Note 6 - Investments (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] |
| (in thousands) | | | June 30, 2026 | | | | December 31, 2025 | |
| Available-for-sale fixed maturities, at fair value (amortized cost of $39,121 and $37,005, respectively) | | $ | 38,556 | | | $ | 36,765 | |
| Limited liability investment, at fair value (a) | | | 4,127 | | | | 3,476 | |
| Limited liability investments (a) | | | 637 | | | | 649 | |
| Investments in private companies, at adjusted cost (a) | | | 575 | | | | 575 | |
| Short-term investments, at cost which approximates fair value | | | 179 | | | | 178 | |
| Total investments | | $ | 44,074 | | | $ | 41,643 | |
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| Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
| (in thousands) | | June 30, 2026 | |
| | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Estimated Fair Value | |
| Fixed maturities: | | | | | | | | | | | | | | | | |
| U.S. government, government agencies and authorities | | $ | 13,939 | | | $ | 8 | | | $ | 112 | | | $ | 13,835 | |
| States, municipalities and political subdivisions | | | 1,238 | | | | 1 | | | | 14 | | | | 1,225 | |
| Mortgage-backed | | | 11,692 | | | | 16 | | | | 296 | | | | 11,412 | |
| Asset-backed | | | 1,681 | | | | 2 | | | | 18 | | | | 1,665 | |
| Corporate | | | 10,571 | | | | 18 | | | | 170 | | | | 10,419 | |
| Total fixed maturities | | $ | 39,121 | | | $ | 45 | | | $ | 610 | | | $ | 38,556 | |
| (in thousands) | | December 31, 2025 | |
| | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Estimated Fair Value | |
| Fixed maturities: | | | | | | | | | | | | | | | | |
| U.S. government, government agencies and authorities | | $ | 13,441 | | | $ | 97 | | | $ | 47 | | | $ | 13,491 | |
| States, municipalities and political subdivisions | | | 1,788 | | | | 3 | | | | 20 | | | | 1,771 | |
| Mortgage-backed | | | 9,965 | | | | 79 | | | | 226 | | | | 9,818 | |
| Asset-backed | | | 1,365 | | | | 10 | | | | 11 | | | | 1,364 | |
| Corporate | | | 10,446 | | | | 58 | | | | 183 | | | | 10,321 | |
| Total fixed maturities | | $ | 37,005 | | | $ | 247 | | | $ | 487 | | | $ | 36,765 | |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
| (in thousands) | | June 30, 2026 | |
| | | Amortized Cost | | | Estimated Fair Value | |
| Due in one year or less | | $ | 7,182 | | | $ | 7,110 | |
| Due after one year through five years | | | 21,102 | | | | 20,940 | |
| Due after five years through ten years | | | 5,186 | | | | 5,095 | |
| Due after ten years | | | 5,651 | | | | 5,411 | |
| Total | | $ | 39,121 | | | $ | 38,556 | |
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| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
| (in thousands) | | June 30, 2026 | |
| | | Less than 12 Months | | | Greater than 12 Months | | | Total | |
| | | Estimated Fair Value | | | Unrealized Loss | | | Estimated Fair Value | | | Unrealized Loss | | | Estimated Fair Value | | | Unrealized Loss | |
| Fixed maturities: | | | | | | | | | | | | | | | | | | | | | | | | |
| U.S. government, government agencies and authorities | | $ | 2,053 | | | $ | 14 | | | $ | 9,633 | | | $ | 98 | | | $ | 11,686 | | | $ | 112 | |
| States, municipalities and political subdivisions | | | 230 | | | | 5 | | | | 466 | | | | 9 | | | | 696 | | | | 14 | |
| Mortgage-backed | | | 3,965 | | | | 41 | | | | 4,601 | | | | 255 | | | | 8,566 | | | | 296 | |
| Asset-backed | | | 1,020 | | | | 8 | | | | 142 | | | | 10 | | | | 1,162 | | | | 18 | |
| Corporate | | | 3,005 | | | | 24 | | | | 5,203 | | | | 146 | | | | 8,208 | | | | 170 | |
| Total fixed maturities | | $ | 10,273 | | | $ | 92 | | | $ | 20,045 | | | $ | 518 | | | $ | 30,318 | | | $ | 610 | |
| (in thousands) | | December 31, 2025 | |
| | | Less than 12 Months | | | Greater than 12 Months | | | Total | |
| | | Estimated Fair Value | | | Unrealized Loss | | | Estimated Fair Value | | | Unrealized Loss | | | Estimated Fair Value | | | Unrealized Loss | |
| Fixed maturities: | | | | | | | | | | | | | | | | | | | | | | | | |
| U.S. government, government agencies and authorities | | $ | 2,477 | | | $ | 21 | | | $ | 2,370 | | | $ | 26 | | | $ | 4,847 | | | $ | 47 | |
| States, municipalities and political subdivisions | | | 300 | | | | — | | | | 1,088 | | | | 20 | | | | 1,388 | | | | 20 | |
| Mortgage-backed | | | 336 | | | | 1 | | | | 3,433 | | | | 225 | | | | 3,769 | | | | 226 | |
| Asset-backed | | | — | | | | — | | | | 417 | | | | 11 | | | | 417 | | | | 11 | |
| Corporate | | | 408 | | | | — | | | | 6,113 | | | | 183 | | | | 6,521 | | | | 183 | |
| Total fixed maturities | | $ | 3,521 | | | $ | 22 | | | $ | 13,421 | | | $ | 465 | | | $ | 16,942 | | | $ | 487 | |
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| Investment Income [Table Text Block] |
| (in thousands) | | Three months ended June 30, | | | Six months ended June 30, | |
| | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| Net investment income | | $ | 395 | | | $ | 410 | | | | 798 | | | | 790 | |
| Net realized gains | | | 1,953 | | | | 128 | | | | 1,964 | | | | 57 | |
| Gain on change in fair value of limited liability investment, at fair value | | | 357 | | | | 177 | | | | 669 | | | | 178 | |
| Interest and investment income, net | | $ | 2,705 | | | $ | 715 | | | $ | 3,431 | | | $ | 1,025 | |
| (in thousands) | | Three months ended June 30, | | | Six months ended June 30, | |
| | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| Investment income: | | | | | | | | | | | | | | | | |
| Interest from fixed maturities | | $ | 366 | | | $ | 351 | | | $ | 720 | | | $ | 687 | |
| Dividends | | | 10 | | | | 10 | | | | 20 | | | | 20 | |
| Loss from limited liability investments | | | (12 | ) | | | — | | | | (12 | ) | | | — | |
| Other | | | 68 | | | | 73 | | | | 139 | | | | 143 | |
| Gross investment income | | | 432 | | | | 434 | | | | 867 | | | | 850 | |
| Investment expenses | | | (37 | ) | | | (24 | ) | | | (69 | ) | | | (60 | ) |
| Net investment income | | $ | 395 | | | $ | 410 | | | $ | 798 | | | $ | 790 | |
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| Realized Gain (Loss) on Investments [Table Text Block] |
| (in thousands) | | Three months ended June 30, | | | Six months ended June 30, | |
| | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| Available-for-sale fixed maturities: | | | | | | | | | | | | | | | | |
| Gross realized gains | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| Gross realized losses | | | — | | | | (4 | ) | | | — | | | | (76 | ) |
| Net realized losses on available-for-sale fixed maturities | | | — | | | | (4 | ) | | | — | | | | (76 | ) |
| Limited liability investment, at fair value | | | 1,320 | | | | 95 | | | | 1,330 | | | | 95 | |
| Investments in private companies | | | 633 | | | | 37 | | | | 634 | | | | 38 | |
| Net realized gains | | $ | 1,953 | | | $ | 128 | | | $ | 1,964 | | | $ | 57 | |
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