Investments - Additional Information (Details)	3 Months Ended				12 Months Ended
	Mar. 31, 2026 USD ($) FinancialInstrument		Sep. 30, 2025 USD ($) shares	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) FinancialInstrument
Schedule of Available-for-sale Securities
Credit Loss Change, Available-for-Sale Investments	$ 0
Financial instruments measured on non-recurring basis | FinancialInstrument	0				0
Fair value transfer, investments between levels	$ 0			$ 0
Fixed maturities, available-for-sale	254,123,000				$ 253,152,000
Fair value of warrants	1,064,000				0
Surplus Note
Schedule of Available-for-sale Securities
Fixed maturities, available-for-sale	$ 6,000,000	[1]	$ 6,000,000		$ 6,000,000	[1]
Warrants issued to purchase common stock | shares			18,497

[1] Distributions will be generated from operating income, investment gains, underlying investments of funds, and from liquidation of the underlying assets of the funds. The Company estimates that the underlying assets of the funds will be liquidated over the next four to seven years.