Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Class A Common stock	Class B Common Stock	Total stockholders' equity	Common stock Class A Common stock	Common stock Class B Common Stock	Additional paid in capital	Accumulated deficit	Non-controlling interest
Beginning balance (in shares) at Dec. 31, 2020					18,304,000	18,447,000
Beginning balance at Dec. 31, 2020	$ (38,404)			$ (4,876)	$ 183	$ 184	$ 29,371	$ (34,614)	$ (33,528)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions	0
Net (loss) income	(1,089)			(396)				(396)	(693)
Exercise of stock options (in shares)					9,000
Exercise of stock options	226			226			226
Equity-based compensation	1,941			1,941			1,941
Activity under employee stock purchase plan (in shares)					2,000
Activity under employee stock purchase plan	205			205			205
Redemption of LLC Units (in shares)					133,000	133,000
Redemption of LLC Units	0			(249)	$ 1	$ (1)	(249)		249
Deferred tax adjustments related to Tax Receivable Agreement	816			798			798		18
Reallocation of Non-controlling interest	0			2				2	(2)
Ending balance (in shares) at Mar. 31, 2021					18,448,000	18,314,000
Ending balance at Mar. 31, 2021	(36,305)			(2,349)	$ 184	$ 183	32,292	(35,008)	(33,956)
Beginning balance (in shares) at Dec. 31, 2020					18,304,000	18,447,000
Beginning balance at Dec. 31, 2020	(38,404)			(4,876)	$ 183	$ 184	29,371	(34,614)	(33,528)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	7,415
Activity under employee stock purchase plan				613
Redemption of LLC Units				(2,673)
Ending balance (in shares) at Sep. 30, 2021					19,786,000	17,239,000
Ending balance at Sep. 30, 2021	(75,684)			(18,860)	$ 196	$ 173	41,820	(61,049)	(56,824)
Beginning balance (in shares) at Mar. 31, 2021					18,448,000	18,314,000
Beginning balance at Mar. 31, 2021	(36,305)			(2,349)	$ 184	$ 183	32,292	(35,008)	(33,956)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	3,136			1,487				1,487	1,649
Exercise of stock options (in shares)					31,000
Exercise of stock options	439			439			439
Equity-based compensation	1,851			1,851			1,851
Activity under employee stock purchase plan (in shares)					2,000
Activity under employee stock purchase plan	214			214			214
Redemption of LLC Units (in shares)					728,000	728,000
Redemption of LLC Units	0			(1,280)	$ 7	$ (7)	(1,280)		1,280
Deferred tax adjustments related to Tax Receivable Agreement	3,164			3,063			3,063		101
Reallocation of Non-controlling interest	0			(6)				(6)	6
Ending balance (in shares) at Jun. 30, 2021					19,209,000	17,586,000
Ending balance at Jun. 30, 2021	(27,501)			3,419	$ 191	$ 176	36,579	(33,527)	(30,920)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared	(60,000)			(31,657)				(31,657)	(28,343)
Net (loss) income	5,368			4,036				4,036	1,332
Exercise of stock options (in shares)					229,000
Exercise of stock options	2,311			2,311	$ 2		2,309
Equity-based compensation	1,851			1,851			1,851
Activity under employee stock purchase plan (in shares)					1,000
Activity under employee stock purchase plan	194			194			194
Redemption of LLC Units (in shares)					347,000	347,000
Redemption of LLC Units	0			(1,144)	$ 3	$ (3)	(1,144)		1,144
Deferred tax adjustments related to Tax Receivable Agreement	2,093			2,031			2,031		62
Reallocation of Non-controlling interest	0			99				99	(99)
Ending balance (in shares) at Sep. 30, 2021					19,786,000	17,239,000
Ending balance at Sep. 30, 2021	(75,684)			(18,860)	$ 196	$ 173	41,820	(61,049)	(56,824)
Beginning balance (in shares) at Dec. 31, 2021		20,198,000	16,909,000		20,198,000	16,909,000
Beginning balance at Dec. 31, 2021	(69,188)			(14,020)	$ 200	$ 170	46,281	(60,671)	(55,168)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(5,383)			(2,257)				(2,257)	(3,126)
Exercise of stock options (in shares)					19,000
Exercise of stock options	256			256			256
Equity-based compensation	5,788			5,788			5,788
Activity under employee stock purchase plan (in shares)					3,000
Activity under employee stock purchase plan	214			214			214
Redemption of LLC Units (in shares)					101,000	101,000
Redemption of LLC Units	0			(344)	$ 1	$ (1)	(344)		344
Deferred tax adjustments related to Tax Receivable Agreement	416			394			394		22
Reallocation of Non-controlling interest	0			(478)				(478)	478
Ending balance (in shares) at Mar. 31, 2022					20,321,000	16,808,000
Ending balance at Mar. 31, 2022	(67,897)			(10,447)	$ 201	$ 169	52,589	(63,406)	(57,450)
Beginning balance (in shares) at Dec. 31, 2021		20,198,000	16,909,000		20,198,000	16,909,000
Beginning balance at Dec. 31, 2021	(69,188)			(14,020)	$ 200	$ 170	46,281	(60,671)	(55,168)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	46
Activity under employee stock purchase plan				556
Redemption of LLC Units (in shares)		707,000	707,000
Redemption of LLC Units				(2,300)
Ending balance (in shares) at Sep. 30, 2022		21,202,000	16,201,000		21,202,000	16,201,000
Ending balance at Sep. 30, 2022	(45,665)			6,329	$ 210	$ 163	67,238	(61,282)	(51,994)
Beginning balance (in shares) at Mar. 31, 2022					20,321,000	16,808,000
Beginning balance at Mar. 31, 2022	(67,897)			(10,447)	$ 201	$ 169	52,589	(63,406)	(57,450)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	2,389			342				342	2,047
Exercise of stock options (in shares)					94,000
Exercise of stock options	1,008			1,008	$ 1		1,007
Equity-based compensation	5,173			5,173			5,173
Activity under employee stock purchase plan (in shares)					4,000
Activity under employee stock purchase plan	177			177			177
Redemption of LLC Units (in shares)					115,000	115,000
Redemption of LLC Units	0			(377)	$ 1	$ (1)	(377)		377
Deferred tax adjustments related to Tax Receivable Agreement	403			373			373		30
Reallocation of Non-controlling interest	0			(226)				(226)	226
Ending balance (in shares) at Jun. 30, 2022					20,534,000	16,693,000
Ending balance at Jun. 30, 2022	(58,747)			(3,977)	$ 203	$ 168	58,942	(63,290)	(54,770)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	3,040			1,979				1,979	1,061
Exercise of stock options (in shares)					171,000
Exercise of stock options	3,006			3,006	$ 2		3,004
Equity-based compensation	5,395			5,395			5,395
Activity under employee stock purchase plan (in shares)					5,000
Activity under employee stock purchase plan	165			165			165
Redemption of LLC Units (in shares)		492,000	492,000		492,000	492,000
Redemption of LLC Units	0			(1,579)	$ 5	$ (5)	(1,579)		1,579
Deferred tax adjustments related to Tax Receivable Agreement	1,476			1,311			1,311		165
Reallocation of Non-controlling interest	0			29				29	(29)
Ending balance (in shares) at Sep. 30, 2022		21,202,000	16,201,000		21,202,000	16,201,000
Ending balance at Sep. 30, 2022	$ (45,665)			$ 6,329	$ 210	$ 163	$ 67,238	$ (61,282)	$ (51,994)