Investments - Allowance for Credit Loss (Details) - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Investments [Abstract] | ||
| Beginning balance | $ 385,000 | $ 480,000 |
| Provision for change in allowance | (20,000) | (95,000) |
| Ending balance | 365,000 | 385,000 |
| Mortgage Loans [Member] | ||
| Investments [Abstract] | ||
| Beginning balance | 220,000 | 235,000 |
| Provision for change in allowance | (10,000) | (15,000) |
| Ending balance | 210,000 | 220,000 |
| Notes Receivable [Member] | ||
| Investments [Abstract] | ||
| Beginning balance | 135,000 | 195,000 |
| Provision for change in allowance | (5,000) | (60,000) |
| Ending balance | 130,000 | 135,000 |
| Unfunded Loan Commitments [Member] | ||
| Investments [Abstract] | ||
| Beginning balance | 30,000 | 50,000 |
| Provision for change in allowance | (5,000) | (20,000) |
| Ending balance | $ 25,000 | $ 30,000 |