Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities
Net income	$ 79,201	$ 52,170	$ 45,847
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	14,913	11,624	5,584
Depreciation and amortization expense	4,503	4,115	3,544
Allowance for credit loss on fixed maturity securities	0	236	106
Net realized and unrealized losses (gains) on investments	(2,941)	7,529	(1,277)
Amortization of premium on fixed maturity securities	(9)	1,607	2,317
Deferred income tax expense	(2,826)	(3,519)	641
Changes in operating assets and liabilities:
Accrued investment income	(1,505)	(1,052)	(180)
Premium receivable	(99,114)	(74,846)	(39,170)
Deferred policy acquisition costs	(4,250)	(787)	(20,472)
Reinsurance recoverables	(83,181)	(36,298)	(52,587)
Ceded unearned premiums	(61,724)	(145,768)	(23,284)
Prepaid expenses and other assets	(24,885)	(4,017)	591
Accounts payable and other accrued liabilities	15,666	5,426	(946)
Reserve for losses and loss adjustment expenses	110,860	58,049	44,330
Unearned premiums	125,789	186,649	101,176
Ceded premiums payable	35,615	108,667	15,227
Funds held under reinsurance treaty	2,739	(202)	6,367
Income taxes payable	7,255	0	0
Net cash provided by operating activities	116,106	169,583	87,814
Investing activities
Purchases of property and equipment	(15)	(313)	(18)
Capitalized software costs	(6,744)	(5,623)	(4,836)
Purchases of fixed maturity securities	(233,770)	(382,114)	(166,894)
Purchases of equity securities	(945)	(10,518)	(49,680)
Purchase of equity method investment	(3,000)	0	0
Sales and maturities of fixed maturity securities	120,285	242,726	120,198
Sales of equity securities	295	0	41,553
Change in securities receivable or payable, net	950	(950)	1,500
Acquisitions, net of cash acquired	(5,534)	(15)	(11)
Net cash used in investing activities	(128,478)	(156,807)	(58,188)
Financing activities
Proceeds from line of credit, net of repayments	16,200	36,400	0
Proceeds from common stock issued via employee stock purchase plan	799	760	719
Proceeds from common stock issued via stock option exercises	1,237	2,272	2,092
Policy holder contribution to surplus	90	0	0
Repurchase of common stock	(22,266)	(34,415)	(15,852)
Net cash (used in) provided by financing activities	(3,940)	5,017	(13,041)
Net (decrease) increase in cash, cash equivalents and restricted cash	(16,312)	17,793	16,585
Cash, cash equivalents and restricted cash at beginning of period	68,164	50,371	33,786
Cash, cash equivalents and restricted cash at end of period	51,852	68,164	50,371
Supplementary cash flow information:
Cash paid for income taxes	21,124	18,890	2,104
Cash paid for interest	3,682	704	$ 0
Cash and cash equivalents	51,546	68,108
Restricted cash	306	56
Cash and cash equivalents and restricted cash	$ 51,852	$ 68,164