CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue
Net earned premium	$ 89.3	$ 76.5	$ 173.7	$ 144.7
Ceding commission income	16.5	17.5	37.5	34.7
Net investment income	8.1	5.6	15.7	10.6
Commission and other income	8.1	5.0	14.2	9.8
Total revenue	122.0	104.6	241.1	199.8
Expense
Loss and loss adjustment expense, net	70.5	75.9	136.4	139.5
Other insurance expense	18.8	15.0	36.1	28.6
Sales and marketing	36.8	24.8	67.2	53.0
Technology development	21.2	24.1	42.1	45.9
General and administrative	29.8	30.7	59.6	63.4
Total expense	177.1	170.5	341.4	330.4
Loss before income taxes	(55.1)	(65.9)	(100.3)	(130.6)
Income tax expense	2.1	1.3	4.2	2.4
Net loss	(57.2)	(67.2)	(104.5)	(133.0)
Other comprehensive loss, net of tax
Unrealized gain on investments in fixed maturities	1.3	1.2	2.0	7.2
Foreign currency translation adjustment	(0.7)	0.1	(1.6)	(0.6)
Comprehensive loss	$ (56.6)	$ (65.9)	$ (104.1)	$ (126.4)
Per share data:
Net loss per share attributable to common stockholders—basic (usd per share)	$ (0.81)	$ (0.97)	$ (1.48)	$ (1.92)
Net loss per share attributable to common stockholders—diluted (usd per share)	$ (0.81)	$ (0.97)	$ (1.48)	$ (1.92)
Weighted average common shares outstanding—basic (in shares)	70,721,227	69,534,731	70,502,856	69,434,971
Weighted average common shares outstanding—diluted (in shares)	70,721,227	69,534,731	70,502,856	69,434,971