CONDENSED CONSOLIDATED STATEMENTS OF MEZZANINE AND SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)	Total	Common Stock Outstanding	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interest	Noncontrolling Interest Mezzanine
Equity, beginning balance at Dec. 31, 2017	$ 164,183,426	$ 32,305	$ 158,181,192	$ 1,734,531	$ 4,235,398	$ 172,129,744
Equity, beginning balance (in shares) at Dec. 31, 2017		32,304,876
Net income	2,746,903			2,160,455	586,448	12,970,752
Shares issued for exercise of options and warrants	1,923,784	$ 310	1,923,474
Shares issued for exercise of options and warrants (in shares)		309,826
Share-based compensation	631,562	$ 38	631,524			202,382
Share-based compensation (in shares)		37,593
Dividends	0					(2,000,000)
Equity, ending balance at Mar. 31, 2018	170,488,143	$ 32,653	160,736,190	4,897,454	4,821,846	190,654,312
Equity, ending balance (in shares) at Mar. 31, 2018		32,652,295
Equity, beginning balance at Dec. 31, 2017	164,183,426	$ 32,305	158,181,192	1,734,531	4,235,398	172,129,744
Equity, beginning balance (in shares) at Dec. 31, 2017		32,304,876
Equity, ending balance at Dec. 31, 2018	181,544,152	$ 34,578	162,723,051	17,788,203	998,320	225,117,029
Equity, ending balance (in shares) at Dec. 31, 2018		34,578,040
Equity, beginning balance at Mar. 31, 2018	170,488,143	$ 32,653	160,736,190	4,897,454	4,821,846	190,654,312
Equity, beginning balance (in shares) at Mar. 31, 2018		32,652,295
Net income	3,007,968			2,664,102	343,866	4,857,625
Purchase price adjustment from merger	868,000		868,000
Shares issued for exercise of options and warrants	423,545	$ 188	423,357			200,000
Shares issued for exercise of options and warrants (in shares)		188,875
Share-based compensation	0					202,382
Noncontrolling interest capital charge	27,500				27,500
Equity, ending balance at Jun. 30, 2018	174,815,156	$ 32,841	162,027,547	7,561,556	5,193,212	195,914,319
Equity, ending balance (in shares) at Jun. 30, 2018		32,841,170
Equity, beginning balance at Dec. 31, 2018	181,544,152	$ 34,578	162,723,051	17,788,203	998,320	225,117,029
Equity, beginning balance (in shares) at Dec. 31, 2018		34,578,040
Net income	549,892			139,664	410,228	(3,000,021)
Purchase of treasury shares	0	$ (93)	93			(40,000)
Purchase of treasury shares (in shares)		(93,451)
Shares issued for exercise of options and warrants	139,974	$ 17	139,957			155,000
Shares issued for exercise of options and warrants (in shares)		17,516
Share-based compensation	142,752	$ 2	142,750			202,382
Share-based compensation (in shares)		1,599
Dividends	0					(10,000,000)
Equity, ending balance at Mar. 31, 2019	182,376,770	$ 34,504	163,005,851	17,927,867	1,408,548	212,434,390
Equity, ending balance (in shares) at Mar. 31, 2019		34,503,704
Net income	3,768,191			3,545,216	222,975	6,895,740
Shares issued for exercise of options and warrants	758,128	$ 135	757,993			50,000
Shares issued for exercise of options and warrants (in shares)		135,108
Share-based compensation	127,999		127,999			202,382
Dividends	(941,588)				(941,588)
Equity, ending balance at Jun. 30, 2019	$ 186,089,500	$ 34,639	$ 163,891,843	$ 21,473,083	$ 689,935	$ 219,582,512
Equity, ending balance (in shares) at Jun. 30, 2019		34,638,812