Segment Information - Information by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Gross written premiums	$ 132,095	$ 111,335	$ 101,853
Net written premiums	101,429	92,940	87,724
Net earned premiums	98,802	89,103	89,089
Other income	2,671	2,615	2,109
Segment revenue	101,473	91,718	91,198
Losses and loss adjustment expenses, net	69,861	56,228	59,744
Policy acquisition costs	28,451	26,105	24,911
Operating expenses	16,509	18,468	17,582
Segment expenses	114,821	100,801	102,237
Segment underwriting gain (loss)	(13,348)	(9,083)	(11,039)
Net investment income	1,968	3,156	4,031
Net realized investment gains	2,878	8,126	1,196
Other gains	11,664	260	0
Change in fair value of equity securities	(2,020)	228	(427)
Interest expense	(2,852)	(2,925)	(2,882)
Income (loss) before income taxes	(1,710)	(238)	(9,121)
Deferred policy acquisition costs	12,267	12,243	11,906	$ 12,011
Unearned premiums	65,269	56,224	51,503
Unpaid losses and loss adjustment expenses	139,085	111,270	107,246	$ 92,807
Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Gross written premiums	117,075	102,763	94,391
Net written premiums	87,307	85,385	81,966
Net earned premiums	87,759	82,409	83,858
Other income	215	242	216
Segment revenue	87,974	82,651	84,074
Losses and loss adjustment expenses, net	63,868	53,263	53,256
Policy acquisition costs	25,687	25,051	23,511
Operating expenses	11,648	12,644	12,881
Segment expenses	101,203	90,958	89,648
Segment underwriting gain (loss)	(13,229)	(8,307)	(5,574)
Income (loss) before income taxes	(13,229)	(8,307)	(5,574)
Deferred policy acquisition costs	10,619	11,858	12,033
Unearned premiums	57,491	51,535	47,674
Unpaid losses and loss adjustment expenses	135,084	106,662	101,850
Operating Segments | Personal Lines
Segment Reporting Information [Line Items]
Gross written premiums	15,020	8,572	7,462
Net written premiums	14,122	7,555	5,758
Net earned premiums	11,043	6,694	5,231
Other income	143	150	143
Segment revenue	11,186	6,844	5,374
Losses and loss adjustment expenses, net	5,993	2,965	6,488
Policy acquisition costs	3,307	2,044	1,744
Operating expenses	1,357	1,069	1,233
Segment expenses	10,657	6,078	9,465
Segment underwriting gain (loss)	529	766	(4,091)
Income (loss) before income taxes	529	766	(4,091)
Deferred policy acquisition costs	2,075	1,183	1,007
Unearned premiums	7,778	4,689	3,829
Unpaid losses and loss adjustment expenses	4,001	4,608	5,396
Operating Segments | Underwriting
Segment Reporting Information [Line Items]
Gross written premiums	132,095	111,335	101,853
Net written premiums	101,429	92,940	87,724
Net earned premiums	98,802	89,103	89,089
Other income	358	392	359
Segment revenue	99,160	89,495	89,448
Losses and loss adjustment expenses, net	69,861	56,228	59,744
Policy acquisition costs	28,994	27,095	25,255
Operating expenses	13,005	13,713	14,114
Segment expenses	111,860	97,036	99,113
Segment underwriting gain (loss)	(12,700)	(7,541)	(9,665)
Income (loss) before income taxes	(12,700)	(7,541)	(9,665)
Operating Segments | Wholesale Agency
Segment Reporting Information [Line Items]
Other income	5,848	7,571	9,073
Segment revenue	5,848	7,571	9,073
Policy acquisition costs	3,727	4,938	6,063
Operating expenses	2,382	3,107	2,180
Segment expenses	6,109	8,045	8,243
Segment underwriting gain (loss)	(261)	(474)	830
Income (loss) before income taxes	(261)	(474)	830
Corp-orate
Segment Reporting Information [Line Items]
Other income	365	245	224
Segment revenue	365	245	224
Operating expenses	1,122	1,648	1,288
Segment expenses	1,122	1,648	1,288
Segment underwriting gain (loss)	(757)	(1,403)	(1,064)
Net investment income	1,968	3,156	4,031
Net realized investment gains	2,878	8,126	1,196
Other gains	11,664	260
Change in fair value of equity securities	(2,020)	228	(427)
Interest expense	(2,852)	(2,925)	(2,882)
Income (loss) before income taxes	10,881	7,442	854
Eliminations
Segment Reporting Information [Line Items]
Other income	(3,900)	(5,593)	(7,547)
Segment revenue	(3,900)	(5,593)	(7,547)
Policy acquisition costs	(4,270)	(5,928)	(6,407)
Segment expenses	(4,270)	(5,928)	(6,407)
Segment underwriting gain (loss)	370	335	(1,140)
Income (loss) before income taxes	370	335	(1,140)
Deferred policy acquisition costs	$ (427)	$ (798)	$ (1,134)