CONSOLIDATED STATEMENTS OF MEZZANINE AND STOCKHOLDERS' EQUITY - USD ($)	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock Outstanding	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest	Mezzanine Equity – Noncontrolling Interest in APC Noncontrolling Interest	Mezzanine Equity – Noncontrolling Interest in APC Noncontrolling Interest Cumulative Effect, Period of Adoption, Adjustment
Balance at beginning at Dec. 31, 2017	$ 164,183,000	$ 1,002,000	$ 32,000	$ 158,181,000	$ 1,735,000	$ 1,002,000	$ 4,235,000	$ 172,130,000	$ 7,351,000
Balance at beginning (in shares) at Dec. 31, 2017			32,304,876
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201409Member
Net income	$ 12,378,000				10,835,000		1,543,000	47,890,000
Purchase price adjustment from Merger	868,000			868,000
Repurchase of treasury shares	432,000			(3,784,000)	4,216,000			(1,264,000)
Repurchase of treasury shares (in shares)			(168,493)
Shares issued for exercise of options and warrants	3,997,000		$ 1,000	3,996,000				200,000
Shares issued for exercise of options and warrants (in shares)			884,259
Share-based compensation	632,000			632,000				810,000
Share-based compensation (in shares)			37,593
Noncontrolling interest capital change	28,000						28,000
Dividends	(1,975,000)						(1,975,000)	(2,000,000)
Acquisition of additional shares in consolidated entity	0			2,832,000			(2,832,000)
Release of 50% holdback shares (in shares)			1,519,805
Release of 50% holdback shares	0		$ 2,000	(2,000)
Balance at ending at Dec. 31, 2018	181,545,000		$ 35,000	162,723,000	17,788,000		999,000	225,117,000
Balance at ending (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	1,808,000
Repurchase of treasury shares	(7,287,000)		$ (1,000)	(7,286,000)				(283,000)
Repurchase of treasury shares (in shares)			(601,581)
Shares issued for exercise of options and warrants	3,233,000			3,233,000
Shares issued for exercise of options and warrants (in shares)			418,619
Share-based compensation	940,000			940,000				607,000
Share-based compensation (in shares)			1,599
Noncontrolling interest capital change	28,000						28,000
Dividends	(1,990,000)						(1,990,000)	(60,000,000)
Reclassification of options liability to equity	0							1,185,000
Release of 50% holdback shares (in shares)			1,511,380
Release of 50% holdback shares	0		$ 2,000	(2,000)
Stock subscription	0							754,000
Shares issued in connection with business acquisition	0							414,000
Cost of equity issuance of preferred shares	0							(878,000)
Balance at ending at Dec. 31, 2019	192,335,000		$ 36,000	159,608,000	31,905,000		786,000	168,724,000
Balance at ending (in shares) at Dec. 31, 2019			35,908,057
Increase (Decrease) in Stockholders' Equity
Net income	38,699,000				37,866,000		833,000	83,621,000
Repurchase of treasury shares	(301,000)			(301,000)
Repurchase of treasury shares (in shares)			(16,897)
Distribution to noncontrolling interest								(1,037,000)
Shares issued for exercise of options and warrants	11,492,000		$ 1,000	11,491,000
Shares issued for exercise of options and warrants (in shares)			1,240,622
Share-based compensation	3,383,000			3,383,000
Shares issued for vesting of restricted stock awards (in shares)			66,788
Shares issued for cashless exercise of warrants (in shares)			66,517
Cancellation of restricted stock awards	(236,000)			(236,000)
Dividends (in shares)			4,984,050
Dividends	85,539,000		$ 5,000	87,066,000			(1,532,000)	(137,071,000)
Balance at ending at Dec. 31, 2020	$ 330,911,000		$ 42,000	$ 261,011,000	$ 69,771,000		$ 87,000	$ 114,237,000
Balance at ending (in shares) at Dec. 31, 2020			42,249,137