Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member] Common Stock Class A [Member]	Common Stock [Member] Common Stock Class B [Member]	Additional Paid-In Capital [Member]	Accumulated Surplus (Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Non-controlling Interest [Member]	Total
Beginning balance at Dec. 31, 2018	$ 1	$ 0	$ 56,567	$ (3,387)	$ (857)	$ 0	$ 52,324
Beginning balance (in shares) at Dec. 31, 2018	14,110,315	1,898,423
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	$ 0	0	18,894	0	0	18,894
Foreign currency translation adjustment	0	0	0	0	(818)	0	(818)
Exercise of stock options	$ 0	$ 0	317	0	0	0	317
Exercise of stock options (in shares)	195,297	0
Cancellation of stock options			(576)			0	(576)
Stock-based compensation	$ 0	$ 0	3,572	0	0	0	3,572
Issuance of Class A common stock in connection with public offering	$ 1	$ 0	26,434	0	0	0	26,435
Issuance of Class A common stock in connection with public offering (in shares)	2,053,572	0
Share repurchase	$ 0	$ 0	(2,827)	0	0	0	(2,827)
Share repurchase (in shares)	(214,286)	0
Conversion of Class B common stock to Class A common stock	$ 0	$ 0	0	0	0	0	0
Conversion of Class B common stock to Class A common stock (in shares)	35,815	(35,815)
Exercise of stock warrants	$ 0	$ 0	0	0	0	0	0
Exercise of stock warrants (in shares)	1,438	0
Ending balance at Dec. 31, 2019	$ 2	$ 0	83,487	15,507	(1,675)	0	97,321
Ending balance (in shares) at Dec. 31, 2019	16,182,151	1,862,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income							18,780
Net income	$ 0	$ 0	0	18,780	0	2,254	21,034
Foreign currency translation adjustment	0	0	0	0	6,532	4,808	11,340
Exercise of stock options	$ 0	$ 0	2,745	0	0	0	2,745
Exercise of stock options (in shares)	832,504	0
Stock-based compensation	$ 0	$ 0	5,628	0	0	0	5,628
Conversion of Class B common stock to Class A common stock	$ 0	$ 0	0	0	0	0	0
Conversion of Class B common stock to Class A common stock (in shares)	60,002	(60,002)
Share cancellation	$ 0	$ 0	(9,715)	0	0	0	(9,715)
Share cancellation (in shares)	(242,681)	0
Issuance of warrants (note 15)	$ 0	$ 0	19,859	0	0	0	19,859
Exercise of stock warrants	$ 0	$ 0	0		0	0	0
Exercise of stock warrants (in shares)	64,717	0
Reclassification of redeemable non-controlling interest	$ 0	$ 0	0	0	0	59,958	59,958
Ending balance at Dec. 31, 2020	$ 2	$ 0	102,004	34,287	4,857	67,020	208,170
Ending balance (in shares) at Dec. 31, 2020	16,896,693	1,802,606
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income							37,757
Net income	$ 0	$ 0	0	37,757	0	5,164	42,921
Foreign currency translation adjustment	0	0	0	0	4,252	443	4,695
Exercise of stock options	$ 0	$ 0	3,430	0	0	0	3,430
Exercise of stock options (in shares)	623,601	0
Stock-based compensation	$ 0	$ 0	5,117	0	0	0	5,117
Conversion of Class B common stock to Class A common stock	$ 0	$ 0	0	0	0	0	0
Conversion of Class B common stock to Class A common stock (in shares)	106,668	(106,668)
Exercise of stock warrants	$ 0	$ 0	1,820	0	0	0	1,820
Exercise of stock warrants (in shares)	242,681	0
Proceeds from a subsidiary equity issuance, net of issuance costs	$ 0	$ 0	482,678	0	0	62,834	545,512
Proceeds from a subsidiary equity issuance, net of issuance costs (in shares)	0	0
Ending balance at Dec. 31, 2021	$ 2	$ 0	$ 595,049	$ 72,044	$ 9,109	$ 135,461	$ 811,665
Ending balance (in shares) at Dec. 31, 2021	17,869,643	1,695,938