Reinsurance - Effects of Reinsurance and Assumption Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Written premiums:
Direct	$ 24,239	$ 21,434	$ 73,825	$ 60,659
Assumed	9,465	8,407	25,233	21,811
Ceded	(7,635)	(4,798)	(19,974)	(13,311)
Net written premiums	26,069	25,043	79,084	69,159
Earned premiums:
Direct	23,858	19,281	67,455	54,652
Assumed	7,912	7,591	22,790	24,232
Ceded	(6,829)	(4,645)	(17,631)	(12,882)
Net earned premiums	24,941	22,227	72,614	66,002
Losses and LAE:
Direct	14,511	11,249	50,628	34,314
Assumed	4,422	5,841	11,251	15,810
Ceded	(2,774)	(2,537)	(8,432)	(9,357)
Total net incurred losses and LAE	$ 16,159	$ 14,553	$ 53,447	$ 40,767