Interim Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2019	$ 12,216	$ 16,437,473	$ 2,456,148	$ (994,610)	$ 17,911,227	$ 2,550,149	$ 20,461,376
Balance, shares at Dec. 31, 2019	12,215,545
Translation adjustment				(98,928)	(98,928)		(98,928)
Net income			1,264,675		1,264,675	67,015	1,331,690
Common stock issued	$ 25	24,725			24,750		24,750
Common stock issued, shares	25,000
Distributions to non-controlling interests						(143,002)	(143,002)
Stock-based compensation		29,582			29,582		29,582
Balance at Mar. 31, 2020	$ 12,241	16,491,780	3,720,823	(1,093,538)	19,131,306	2,474,162	21,605,468
Balance, shares at Mar. 31, 2020	12,240,545
Balance at Dec. 31, 2019	$ 12,216	16,437,473	2,456,148	(994,610)	17,911,227	2,550,149	20,461,376
Balance, shares at Dec. 31, 2019	12,215,545
Net income							3,538,235
Balance at Sep. 30, 2020	$ 12,241	16,550,943	5,436,059	(967,806)	21,031,437	2,804,335	23,835,772
Balance, shares at Sep. 30, 2020	12,240,545
Balance at Dec. 31, 2019	$ 12,216	16,437,473	2,456,148	(994,610)	17,911,227	2,550,149	20,461,376
Balance, shares at Dec. 31, 2019	12,215,545
Balance at Dec. 31, 2020	$ 12,261	16,633,190	5,433,198	(872,121)	21,206,528	2,561,751	23,768,279
Balance, shares at Dec. 31, 2020	12,260,545
Balance at Mar. 31, 2020	$ 12,241	16,491,780	3,720,823	(1,093,538)	19,131,306	2,474,162	21,605,468
Balance, shares at Mar. 31, 2020	12,240,545
Translation adjustment				69,062	69,062		69,062
Net income			1,132,867		1,132,867	132,078	1,264,945
Distributions to non-controlling interests						(54,238)	(54,238)
Stock-based compensation		29,108			29,108		29,108
Balance at Jun. 30, 2020	$ 12,241	16,520,888	4,853,690	(1,024,476)	20,362,343	2,552,002	22,914,345
Balance, shares at Jun. 30, 2020	12,240,545
Translation adjustment				56,670	56,670		56,670
Net income			582,369		582,369	359,231	941,600
Distributions to non-controlling interests						(106,898)	(106,898)
Stock-based compensation		30,055			30,055		30,055
Balance at Sep. 30, 2020	$ 12,241	16,550,943	5,436,059	(967,806)	21,031,437	2,804,335	23,835,772
Balance, shares at Sep. 30, 2020	12,240,545
Balance at Dec. 31, 2020	$ 12,261	16,633,190	5,433,198	(872,121)	21,206,528	2,561,751	23,768,279
Balance, shares at Dec. 31, 2020	12,260,545
Translation adjustment				82,352	82,352		82,352
Net income			1,450,571		1,450,571	186,484	1,637,055
Common stock issued	$ 55	76,305			76,360		76,360
Common stock issued, shares	55,201
Distributions to non-controlling interests						(157,952)	(157,952)
Stock-based compensation		39,589			39,589		39,589
Balance at Mar. 31, 2021	$ 12,316	16,749,084	6,833,769	(789,769)	22,855,400	2,590,283	25,445,683
Balance, shares at Mar. 31, 2021	12,315,746
Balance at Dec. 31, 2020	$ 12,261	16,633,190	5,433,198	(872,121)	21,206,528	2,561,751	23,768,279
Balance, shares at Dec. 31, 2020	12,260,545
Net income							4,588,117
Balance at Sep. 30, 2021	$ 12,327	16,849,411	9,223,154	(783,837)	25,301,055	2,833,336	28,134,391
Balance, shares at Sep. 30, 2021	12,327,246
Balance at Mar. 31, 2021	$ 12,316	16,749,084	6,833,769	(789,769)	22,855,400	2,590,283	25,445,683
Balance, shares at Mar. 31, 2021	12,315,746
Translation adjustment				37,593	37,593		37,593
Net income			1,176,761		1,176,761	268,449	1,445,210
Distributions to non-controlling interests						(151,714)	(151,714)
Stock-based compensation		39,141			39,141		39,141
Balance at Jun. 30, 2021	$ 12,316	16,788,225	8,060,530	(752,176)	24,108,895	2,707,018	26,815,913
Balance, shares at Jun. 30, 2021	12,315,746
Translation adjustment				(31,661)	(31,661)		(31,661)
Net income			1,162,624		1,162,624	343,228	1,505,852
Common stock issued	$ 11	21,149			21,160		21,160
Common stock issued, shares	11,500
Distributions to non-controlling interests						(216,910)	(216,910)
Stock-based compensation		40,037			40,037		40,037
Balance at Sep. 30, 2021	$ 12,327	$ 16,849,411	$ 9,223,154	$ (783,837)	$ 25,301,055	$ 2,833,336	$ 28,134,391
Balance, shares at Sep. 30, 2021	12,327,246