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Reinsurance - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
Reinsurance - Narrative (Details) - USD ($)	Dec. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Effects Of Reinsurance [Line Items]
Ceded premium written		$ 9,395,000	$ 7,635,000	$ 34,490,000	$ 19,974,000
Ceded premiums earned		9,443,000	$ 6,829,000	27,458,000	$ 17,631,000
100% Cede of Commercial Liability Risks In Excess of $400,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)				340,000		$ 400,000
Ceded Commercial Property Risks In Excess of $300,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)				300,000
Ceded Commercial Property Risks In Excess of $200,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)						200,000
Ceded Homeowners Specific Risks In Excess of $300,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)				300,000		$ 300,000
Ceding Commission
Effects Of Reinsurance [Line Items]
Reinsurance retention policy, reinsured percentage	40.00%
Ceding Commission \| Acquisition-related Costs
Effects Of Reinsurance [Line Items]
Ceded premium written	$ 0	$ 2,100,000		$ 6,400,000