CONSOLIDATED STATEMENTS OF MEZZANINE AND STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock Outstanding	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interest	Noncontrolling Interest Mezzanine
Equity, beginning balance at Dec. 31, 2019	$ 192,335	$ 36	$ 159,608	$ 31,905	$ 786	$ 168,725
Equity, beginning balance (in shares) at Dec. 31, 2019		35,908,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	4,147			4,052	95	(1,160)
Purchase of noncontrolling interest	0					(126)
Purchase of treasury shares (in shares)		(16,897)
Purchase of treasury shares	(301)		(301)
Shares issued for exercise of options and warrants (in shares)		151,601
Shares issued for exercise of options and warrants	722		722
Share-based compensation	1,058		1,058
Dividends	0					(10,000)
Equity, ending balance at Mar. 31, 2020	197,961	$ 36	161,087	35,957	881	157,439
Equity, ending balance (in shares) at Mar. 31, 2020		36,042,761
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	7,335			7,044	291	73,666
Purchase of noncontrolling interest	0				0	(125)
Cancellation of restricted stock awards	(236)		(236)
Shares issued for vesting of restricted stock awards (in shares)		24,453
Shares issued for vesting of restricted stock awards	0
Shares issued for exercise of options and warrants (in shares)		242,299
Shares issued for exercise of options and warrants	2,283		2,283
Share-based compensation	852		852
Dividends	(347)				(347)	(20,000)
Equity, ending balance at Jun. 30, 2020	207,848	$ 36	163,986	43,001	825	210,980
Equity, ending balance (in shares) at Jun. 30, 2020		36,309,513
Equity, beginning balance at Dec. 31, 2020	330,911	$ 42	261,011	69,771	87	114,237
Equity, beginning balance (in shares) at Dec. 31, 2020		42,249,137
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	13,698			13,151	547	760
Purchase of noncontrolling interest	(75)				(75)	(150)
Purchase of treasury shares (in shares)		(34,158)
Purchase of treasury shares	(342)		(342)
Cancellation of restricted stock awards (in shares)		(5,281)
Cancellation of restricted stock awards	(144)		(144)
Shares issued for vesting of restricted stock awards (in shares)		7,689
Shares issued for vesting of restricted stock awards	0
Sales of noncontrolling interest	37				37
Shares issued for exercise of options and warrants (in shares)		421,002
Shares issued for exercise of options and warrants	4,256	$ 1	4,255
Share-based compensation	1,346		1,346
Equity, ending balance at Mar. 31, 2021	349,687	$ 43	266,126	82,922	596	114,847
Equity, ending balance (in shares) at Mar. 31, 2021		42,638,389
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	12,671			12,658	13	46,859
Purchase of noncontrolling interest						150
Purchase of treasury shares (in shares)		(100,000)
Purchase of treasury shares	(2,450)		(2,450)
Cancellation of restricted stock awards (in shares)		(5,426)
Cancellation of restricted stock awards	(189)		(189)
Shares issued for vesting of restricted stock awards (in shares)		22,284
Shares issued for vesting of restricted stock awards	0
Sales of noncontrolling interest	0				0
Shares issued for exercise of options and warrants (in shares)		53,504
Shares issued for exercise of options and warrants	561		561
Share-based compensation	1,556		1,556
Sale of Sales by NCI (in shares)		1,638,045
Sale of shares by noncontrolling interest	40,133	$ 1	40,132
Investment in noncontrolling interest	3,769				3,769
Dividends	(1,156)				(1,156)	(20,000)
Equity, ending balance at Jun. 30, 2021	$ 404,582	$ 44	$ 305,736	$ 95,580	$ 3,222	$ 141,856
Equity, ending balance (in shares) at Jun. 30, 2021		44,246,796