Segment and Geographic Information - Schedule of geographical breakdown of direct earned premiums (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	$ 28,493	$ 26,760	$ 82,073	$ 74,131
California
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	16,352	15,737	47,832	43,343
Washington
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	3,567	3,086	9,931	8,410
New Jersey
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	2,853	2,475	8,061	6,718
Oregon
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	1,821	1,862	5,330	5,466
Illinois
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	1,133	1,179	3,193	3,381
Arizona
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	1,410	1,170	3,923	3,332
Pennsylvania
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	735	792	2,133	2,197
Virginia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total premiums earned	$ 622	$ 459	$ 1,670	$ 1,284