CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2019		61,321,424
Beginning Balance at Dec. 31, 2019	$ 469,873	$ 613	$ 486,065	$ 21	$ (16,826)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,926		3,926
Foreign currency translation adjustments	19			19
Net loss	(12,912)				(12,912)
Ending Balance (in shares) at Jun. 30, 2020		61,321,424
Ending Balance at Jun. 30, 2020	460,906	$ 613	489,991	40	(29,738)
Beginning Balance (in shares) at Mar. 31, 2020		61,321,424
Beginning Balance at Mar. 31, 2020	466,202	$ 613	489,288	19	(23,718)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	703		703
Foreign currency translation adjustments	21			21
Net loss	(6,020)				(6,020)
Ending Balance (in shares) at Jun. 30, 2020		61,321,424
Ending Balance at Jun. 30, 2020	460,906	$ 613	489,991	40	(29,738)
Beginning Balance (in shares) at Dec. 31, 2020		61,321,424
Beginning Balance at Dec. 31, 2020	470,150	$ 613	492,747	78	(23,288)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,073		2,073
Foreign currency translation adjustments	(12)			(12)
Issuance of common stock to board of director member (in shares)		25,200
Issuance of common stock to a board of directors member	250		250
Issuance of common stock in initial public offering, net of issuance costs of $17.7 million (in shares)		11,666,667
Issuance of common stock in initial public offering, net of issuance costs of $17.2 million	146,136	$ 117	146,019
Dividend	(74,500)		(74,500)
Net loss	(14,077)				(14,077)
Ending Balance (in shares) at Jun. 30, 2021		73,013,291
Ending Balance at Jun. 30, 2021	530,020	$ 730	566,589	66	(37,365)
Beginning Balance (in shares) at Mar. 31, 2021		61,321,424
Beginning Balance at Mar. 31, 2021	395,699	$ 613	419,237	71	(24,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	1,083		1,083
Foreign currency translation adjustments	(5)			(5)
Issuance of common stock to board of director member (in shares)		25,200
Issuance of common stock to a board of directors member	250		250
Issuance of common stock in initial public offering, net of issuance costs of $17.7 million (in shares)		11,666,667
Issuance of common stock in initial public offering, net of issuance costs of $17.2 million	146,136	$ 117	146,019
Net loss	(13,143)				(13,143)
Ending Balance (in shares) at Jun. 30, 2021		73,013,291
Ending Balance at Jun. 30, 2021	$ 530,020	$ 730	$ 566,589	$ 66	$ (37,365)