| Schedule of marketable securities |
The Company’s available-for-sale securities as of September 30, 2024 and December 31, 2023 are summarized below (in thousands): | | | | | | | | | | | | | | | Cost | | Unrealized Gains in
Investment Income | | Unrealized
Losses in
Investment Income | | Estimated
Fair Value
(Level 1 Inputs) | September 30, 2024 | | | | | | | | | | | | | Common Stock | | $ | 20,929 | | $ | — | | $ | (206) | | $ | 20,723 | Operating Units | | | 23,253 | | | — | | | (979) | | | 22,274 | Total Equity Securities | | | 44,182 | | | — | | | (1,185) | | | 42,997 | Total Available-for-Sale Securities | | $ | 44,182 | | $ | — | | $ | (1,185) | | $ | 42,997 | | | | | | | | | | | | | | December 31, 2023 | | | | | | | | | | | | | Common Stock | | $ | 20,482 | | $ | — | | $ | (1,732) | | $ | 18,750 | Operating Units | | | 23,253 | | | — | | | (2,558) | | | 20,695 | Total Equity Securities | | | 43,735 | | | — | | | (4,290) | | | 39,445 | Total Available-for-Sale Securities | | $ | 43,735 | | $ | — | | $ | (4,290) | | $ | 39,445 |
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