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Investments (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments |
Schedule of gain and losses on investments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2022 |  | 2021
Investment income, net of investment expenses | ​ | $ | 1,544 | ​ | $ | 768
Realized gains on investments | ​ | ​ | 22 | ​ | ​ | 62
Realized losses on investments | ​ | ​ | (392) | ​ | ​ | (129)
Investment income and realized gains, net of investment expenses | ​ | $ | 1,174 | ​ | $ | 701
Summary of amortized cost, market value and unrealized gains (losses) of debt securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2022
​ | ​ | ​ | ​ | ​ | Gross Unrealized | ​ | ​ | ​
​ |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
U.S. Treasuries | ​ | $ | 35,637 | ​ | $ | 5 | ​ | $ | (320) | ​ | $ | 35,322
Obligations of states, municipalities and political subdivisions | ​ | ​ | 11,549 | ​ | ​ | 2 | ​ | ​ | (1,326) | ​ | ​ | 10,225
Corporate bonds | ​ |  | 31,032 | ​ |  | 32 | ​ |  | (2,837) | ​ |  | 28,227
Residential and commercial mortgage-backed securities | ​ | ​ | 12,790 | ​ | ​ | 11 | ​ | ​ | (1,268) | ​ | ​ | 11,533
Other loan-backed and structured securities | ​ | ​ | 6,804 | ​ | ​ | 6 | ​ | ​ | (476) | ​ | ​ | 6,334
Total investment securities | ​ | $ | 97,812 | ​ | $ | 56 | ​ | $ | (6,227) | ​ | $ | 91,641
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2021
​ | ​ | ​ | ​ | ​ | Gross Unrealized | ​ | ​ | ​
​ |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
U.S. Treasuries | ​ | $ | 5,452 | ​ | $ | 1 | ​ | $ | (36) | ​ | $ | 5,417
Obligations of states, municipalities and political subdivisions | ​ | ​ | 8,913 | ​ | ​ | 21 | ​ | ​ | (84) | ​ | ​ | 8,850
Corporate bonds | ​ |  | 31,491 | ​ |  | 89 | ​ |  | (155) | ​ |  | 31,425
Residential and commercial mortgage-backed securities | ​ | ​ | 14,387 | ​ | ​ | 34 | ​ | ​ | (139) | ​ | ​ | 14,282
Other loan-backed and structured securities | ​ | ​ | 7,637 | ​ | ​ | 5 | ​ | ​ | (41) | ​ | ​ | 7,601
Total investment securities | ​ | $ | 67,880 | ​ | $ | 150 | ​ | $ | (455) | ​ | $ | 67,575
​
Summary of remaining time to maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2022
Remaining Time to Maturity |  | Amortized Cost |  | Fair Value
Due in one year or less | ​ | $ | 34,972 | ​ | $ | 34,878
Due after one year through five years | ​ | ​ | 18,899 | ​ | ​ | 17,293
Due after five years through ten years | ​ | ​ | 19,938 | ​ | ​ | 17,665
Due after ten years | ​ |  | 4,409 | ​ |  | 3,938
Residential and commercial mortgage-backed securities | ​ | ​ | 12,790 | ​ | ​ | 11,533
Other loan-backed and structured securities | ​ | ​ | 6,804 | ​ | ​ | 6,334
Total | ​ | $ | 97,812 | ​ | $ | 91,641
​
Summary of securities with gross unrealized loss position | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than Twelve Months | ​ | Twelve Months or Greater | ​ | Total
​ | ​ | Gross | ​ | ​ | ​ | Gross | ​ | ​ | ​ | Gross | ​ | ​
​ | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair
At December 31, 2022 | ​ | Loss | ​ | Value |  | Loss | ​ | Value |  | Loss | ​ | Value
U.S. Treasuries | ​ | $ | (127) | ​ | $ | 10,748 | ​ | $ | (193) | ​ | $ | 9,824 | ​ | $ | (320) | ​ | $ | 20,572
Obligations of states, municipalities and political subdivisions | ​ | ​ | (929) | ​ | ​ | 6,258 | ​ | ​ | (397) | ​ | ​ | 3,504 | ​ | ​ | (1,326) | ​ | ​ | 9,762
Corporate bonds | ​ | ​ | (1,623) | ​ | ​ | 16,531 | ​ | ​ | (1,214) | ​ | ​ | 10,328 | ​ | ​ | (2,837) | ​ | ​ | 26,859
Residential and commercial mortgage-backed securities | ​ | ​ | (687) | ​ | ​ | 6,565 | ​ | ​ | (581) | ​ | ​ | 4,952 | ​ | ​ | (1,268) | ​ | ​ | 11,517
Other loan-backed and structured securities | ​ | ​ | (359) | ​ | ​ | 4,633 | ​ | ​ | (117) | ​ | ​ | 1,094 | ​ | ​ | (476) | ​ | ​ | 5,727
Total securities | ​ | $ | (3,725) | ​ | $ | 44,735 | ​ | $ | (2,502) | ​ | $ | 29,702 | ​ | $ | (6,227) | ​ | $ | 74,437
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than Twelve Months | ​ | Twelve Months or Greater | ​ | Total
​ | ​ | Gross | ​ | ​ | ​ | Gross | ​ | ​ | ​ | Gross | ​ | ​
​ | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair
At December 31, 2021 | ​ | Loss | ​ | Value |  | Loss | ​ | Value |  | Loss | ​ | Value
U.S. Treasuries | ​ | $ | (36) | ​ | $ | 5,007 | ​ | $ | — | ​ | $ | — | ​ | $ | (36) | ​ | $ | 5,007
Obligations of states, municipalities and political subdivisions | ​ | ​ | (84) | ​ | ​ | 4,292 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (84) | ​ | ​ | 4,292
Corporate bonds | ​ | ​ | (155) | ​ | ​ | 15,446 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (155) | ​ | ​ | 15,446
Residential and commercial mortgage-backed securities | ​ | ​ | (139) | ​ | ​ | 9,687 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (139) | ​ | ​ | 9,687
Other loan-backed and structured securities | ​ | ​ | (41) | ​ | ​ | 6,818 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (41) | ​ | ​ | 6,818
Total securities | ​ | $ | (455) | ​ | $ | 41,250 | ​ | $ | — | ​ | $ | — | ​ | $ | (455) | ​ | $ | 41,250
​

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