Condensed Interim Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Capital Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Earnings (Deficiency) [Member]	Other Comprehensive Income (Loss) [Member]	Total	Non-Controlling Interests [Member]	Total Stockholders' Equity [Member]
Beginning balance at Dec. 31, 2018	$ 11,700	$ 15,328,285	$ 2,941,889	$ (1,222,573)	$ 17,059,301	$ 2,462,231	$ 19,521,532
Beginning balance, shares at Dec. 31, 2018	11,699,657
Translation adjustment				182,293	182,293		182,293
Net income (loss)			1,011,150		1,011,150	29,264	1,040,414
Common stock issued	$ 12	10,838			10,850		10,850
Common stock issued, shares	12,000
Dividends paid			(590,483)		(590,483)		(590,483)
Stock-based compensation		5,747			5,747		5,747
Ending balance at Mar. 31, 2019	$ 11,712	15,344,870	3,362,556	(1,040,280)	17,678,858	2,491,495	20,170,353
Ending balance, shares at Mar. 31, 2019	11,711,657
Beginning balance at Dec. 31, 2018	$ 11,700	15,328,285	2,941,889	(1,222,573)	17,059,301	2,462,231	19,521,532
Beginning balance, shares at Dec. 31, 2018	11,699,657
Net income (loss)					1,395,465
Ending balance at Sep. 30, 2019	$ 12,190	16,291,829	2,860,997	(1,121,247)	18,043,769	2,856,250	20,900,019
Ending balance, shares at Sep. 30, 2019	12,189,545
Beginning balance at Dec. 31, 2018	$ 11,700	15,328,285	2,941,889	(1,222,573)	$ 17,059,301	2,462,231	19,521,532
Beginning balance, shares at Dec. 31, 2018	11,699,657
Common stock issued upon exercise of stock options, shares					315,888
Ending balance at Dec. 31, 2019	$ 12,216	16,437,473	2,456,148	(994,610)	$ 17,911,227	2,550,149	20,461,376
Ending balance, shares at Dec. 31, 2019	12,215,545
Beginning balance at Mar. 31, 2019	$ 11,712	15,344,870	3,362,556	(1,040,280)	17,678,858	2,491,495	20,170,353
Beginning balance, shares at Mar. 31, 2019	11,711,657
Translation adjustment				(56,194)	(56,194)		(56,194)
Net income (loss)			(27,733)		(27,733)	208,531	180,798
Common stock issued upon exercise of stock options	$ 106	128,714			129,020		129,020
Common stock issued upon exercise of stock options, shares	105,888
Common stock issued - convertible debt	$ 200	500,000			500,000		500,000
Common stock issued - convertible debt, shares	200,000
Dividends paid			(885,874)		(885,874)		(885,874)
Distributions to non-controlling interests						(16,461)	(16,461)
Stock-based compensation		61,638			61,638		61,638
Ending balance at Jun. 30, 2019	$ 12,018	16,035,222	2,448,949	(1,096,474)	17,399,715	2,683,565	20,083,280
Ending balance, shares at Jun. 30, 2019	12,017,545
Translation adjustment				(24,773)	(24,773)		(24,773)
Net income (loss)			412,048		412,048	289,983	702,031
Common stock issued	$ 172	194,968			195,140		195,140
Common stock issued, shares	172,000
Distributions to non-controlling interests						(117,298)	(117,298)
Stock-based compensation		61,639			61,639		61,639
Ending balance at Sep. 30, 2019	$ 12,190	16,291,829	2,860,997	(1,121,247)	18,043,769	2,856,250	20,900,019
Ending balance, shares at Sep. 30, 2019	12,189,545
Beginning balance at Dec. 31, 2019	$ 12,216	16,437,473	2,456,148	(994,610)	17,911,227	2,550,149	20,461,376
Beginning balance, shares at Dec. 31, 2019	12,215,545
Translation adjustment				(98,928)	(98,928)		(98,928)
Net income (loss)			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
Ending 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
Ending balance, shares at Mar. 31, 2020	12,240,545
Beginning balance at Dec. 31, 2019	$ 12,216	16,437,473	2,456,148	(994,610)	17,911,227	2,550,149	20,461,376
Beginning balance, shares at Dec. 31, 2019	12,215,545
Net income (loss)					$ 2,979,911
Common stock issued upon exercise of stock options, shares					25,000
Ending balance at Sep. 30, 2020	$ 12,241	16,550,943	5,436,059	(967,806)	$ 21,031,437	2,804,335	23,835,772
Ending balance, shares at Sep. 30, 2020	12,240,545
Beginning 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
Beginning balance, shares at Mar. 31, 2020	12,240,545
Translation adjustment				69,062	69,062		69,062
Net income (loss)			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
Ending 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
Ending balance, shares at Jun. 30, 2020	12,240,545
Translation adjustment				56,670	56,670		56,670
Net income (loss)			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
Ending balance at Sep. 30, 2020	$ 12,241	$ 16,550,943	$ 5,436,059	$ (967,806)	$ 21,031,437	$ 2,804,335	$ 23,835,772
Ending balance, shares at Sep. 30, 2020	12,240,545