Consolidated Statement of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member] Common Stock Class A	Common Stock [Member] Common Stock Class B	Additional Paid-in Capital [Member]	Retained Earnings (Deficit)	Noncontrolling Interest [Member]	Total
Stockholders' Equity, Beginning Balance at Dec. 31, 2019	$ 333	$ 157	$ 250,700	$ (20,982)	$ 628	$ 230,836
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share based compensation			836			836
Vesting of restricted units	1	1	(93)			(91)
Issuance of common stock under ESPP, value	1		419			420
Net income (loss)				(9,216)	(16)	(9,232)
Stockholders' Equity, Ending Balance at Mar. 31, 2020	335	158	251,862	(30,198)	612	222,769
Stockholders' Equity, Beginning Balance at Dec. 31, 2019	333	157	250,700	(20,982)	628	230,836
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						9,969
Stockholders' Equity, Ending Balance at Sep. 30, 2020	339	157	260,365	(10,004)	1,363	252,220
Stockholders' Equity, Beginning Balance at Mar. 31, 2020	335	158	251,862	(30,198)	612	222,769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share based compensation			1,164			1,164
Vesting of restricted units	1		(3)			(2)
Issuance of subsidiary shares in business combination			5,534		1,744	7,278
Net income (loss)				9,498	(470)	9,028
Stockholders' Equity, Ending Balance at Jun. 30, 2020	336	158	258,557	(20,700)	1,886	240,237
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share based compensation			1,421			1,421
Vesting of restricted units	1		(43)			(42)
Class A stock issued in conversion	1
Class B stock converted to Class A stock		(1)
Issuance of common stock under ESPP, value	1		430			431
Net income (loss)				10,696	(523)	10,173
Stockholders' Equity, Ending Balance at Sep. 30, 2020	339	157	260,365	(10,004)	1,363	252,220
Stockholders' Equity, Beginning Balance at Dec. 31, 2020	340	157	261,338	(2,430)	1,452	260,857
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share based compensation			2,134			2,134
Vesting of restricted units	3	1	(919)			(915)
Class A stock issued in conversion	1
Class B stock converted to Class A stock		(1)
Issuance of common stock under ESPP, value	1		537			538
Net income (loss)				2,538	123	2,661
Stockholders' Equity, Ending Balance at Mar. 31, 2021	345	157	263,090	108	1,575	265,275
Stockholders' Equity, Beginning Balance at Dec. 31, 2020	340	157	261,338	(2,430)	1,452	260,857
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						16,120
Stockholders' Equity, Ending Balance at Sep. 30, 2021	349	156	266,698	13,726	1,416	282,345
Stockholders' Equity, Beginning Balance at Mar. 31, 2021	345	157	263,090	108	1,575	265,275
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share based compensation			1,657			1,657
Vesting of restricted units	1		(297)			(296)
Class A stock issued in conversion	1
Class B stock converted to Class A stock		(1)
Net income (loss)				19,096	1	19,097
Stockholders' Equity, Ending Balance at Jun. 30, 2021	347	156	264,450	19,204	1,576	285,733
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share based compensation			1,503			1,503
Issuance of common stock under ESPP, value	2		745			747
Net income (loss)				(5,478)	(160)	(5,638)
Stockholders' Equity, Ending Balance at Sep. 30, 2021	$ 349	$ 156	$ 266,698	$ 13,726	$ 1,416	$ 282,345