CONSOLIDATED STATEMENTS OF MEZZANINE AND STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock Outstanding	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Noncontrolling Interest	Noncontrolling Interest Mezzanine Equity – Non-controlling Interest in APC
Temporary equity, carrying amount, beginning balance at Dec. 31, 2018	$ 225,117,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	1,808,000
Repurchase of treasury shares	(283,000)
Share-based compensation	607,000
Stock subscription	754,000
Shares issued in connection with business acquisition	414,000
Cost of equity issuance of preferred shares	(878,000)
Dividends	(60,000,000)
Reclassification of options liability to equity	1,185,000
Temporary equity, carrying amount, ending balance at Dec. 31, 2019	168,724,000
Balance at beginning at Dec. 31, 2018	181,545,000	$ 35,000	$ 162,723,000	$ 17,788,000	$ 999,000
Balance at beginning (in shares) at Dec. 31, 2018		34,578,040
Increase (Decrease) in Stockholders' Equity
Net income	15,866,000			14,117,000	1,749,000
Repurchase of treasury shares (in shares)		(601,581)
Repurchase of treasury shares	(7,287,000)	$ (1,000)	(7,286,000)
Noncontrolling interest capital charge	28,000				28,000
Share-based compensation	940,000	$ 1,599	940,000
Shares issued for exercise of options and warrants (in shares)		418,619
Shares issued for exercise of options and warrants	3,233,000		3,233,000
Dividends	(1,990,000)				(1,990,000)
Reclassification of options liability to equity	0
Issuance of 50% holdback shares (shares)		1,511,380
Issuance of 50% holdback shares		$ 2,000	(2,000)
Balance at ending at Dec. 31, 2019	192,335,000	$ 36,000	159,608,000	31,905,000	786,000
Balance at ending (in shares) at Dec. 31, 2019		35,908,057
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	83,621,000
Distribution to noncontrolling interest	(1,037,000)
Dividends	(137,071,000)
Temporary equity, carrying amount, ending balance at Dec. 31, 2020	114,237,000
Increase (Decrease) in Stockholders' Equity
Net income	38,699,000			37,866,000	833,000
Repurchase of treasury shares (in shares)		(16,897)
Repurchase of treasury shares	(301,000)	$ 0	(301,000)
Share-based compensation	3,383,000		3,383,000
Cancellation of restricted stock awards	(236,000)		(236,000)
Dividends (shares)		4,984,050
Dividends	85,539,000	$ 5,000	87,066,000		(1,532,000)
Shares issued for vesting of restricted stock awards (in shares)		66,788
Shares issued for vesting of restricted stock awards	0
Shares issued for cashless exercise of warrants (in shares)		66,517
Shares issued for cashless exercise of warrants	0
Shares issued for exercise of options and warrants (in shares)		1,240,622
Shares issued for exercise of options and warrants	11,492,000	$ 1,000	11,491,000
Balance at ending at Dec. 31, 2020	$ 330,911,000	$ 42,000	261,011,000	69,771,000	87,000
Balance at ending (in shares) at Dec. 31, 2020	42,249,137	42,249,137
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	$ (27,331,000)
Sale of non-controlling interest						$ 150,000
Dividends	(30,000,000)
Temporary equity, carrying amount, ending balance at Dec. 31, 2021	55,510,000
Increase (Decrease) in Stockholders' Equity
Net income	76,625,000			73,858,000	2,767,000
Repurchase of treasury shares (in shares)		(174,158)
Repurchase of treasury shares	(5,738,000)		(5,738,000)
Noncontrolling interest capital charge	48,000				48,000
Share-based compensation	6,745,000		6,745,000
Purchase of noncontrolling interest	(75,000)				(75,000)	$ (1,546,000)
Cancellation of restricted stock awards (shares)		(10,707)
Cancellation of restricted stock awards	(334,000)		(334,000)
Shares issued for vesting of restricted stock awards (in shares)		29,973
Shares issued for vesting of restricted stock awards	0
Shares issued for exercise of options and warrants (in shares)		898,583
Shares issued for exercise of options and warrants	9,061,000	$ 1,000	9,060,000
Sale of shares by noncontrolling interest (in shares)		1,638,045
Sale of shares by noncontrolling interest	40,134,000	$ 2,000	40,132,000
Investment in non-controlling interest	3,769,000				3,769,000
Acquisition of non-controlling interest	500,000				500,000
Dividends	(1,156,000)				(1,156,000)
Balance at ending at Dec. 31, 2021	$ 460,490,000	$ 45,000	$ 310,876,000	$ 143,629,000	$ 5,940,000
Balance at ending (in shares) at Dec. 31, 2021	44,630,873	44,630,873