Note 10 - Reinsurance - Effects of Reinsurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Written premiums, direct	$ 1,083,804	$ 816,387	$ 467,424
Earned premiums, direct	959,614	628,973	384,463
Written premiums, assumed	57,754	65,481	67,751
Earned premiums, assumed	56,107	66,299	49,535
Ceded written premiums	(731,531)	(524,575)	(223,443)
Earned premiums, ceded	(669,808)	(378,806)	(200,172)
Net written premiums	410,027	357,293	311,732
Net earned premiums	345,913	316,466	233,826
Losses, direct	228,441	133,517	168,292
LAE, direct	60,834	38,004	13,295
Losses and LAE, direct	289,275	171,521	181,587
Losses, assumed	19,799	23,574	17,184
LAE, assumed	1,789	5,998	1,926
Losses and LAE, assumed	21,588	29,572	19,110
Losses, ceded	(186,706)	(91,261)	(148,106)
LAE, ceded	(51,565)	(31,159)	(11,134)
Losses and LAE, ceded	(238,271)	(122,421)	(159,240)
Losses, net	61,534	65,829	37,370
LAE, net	11,058	12,843	4,087
Losses and loss adjustment expenses	$ 72,592	$ 78,672	$ 41,457