Consolidated Statements of Stockholders' Equity - USD ($)	Common 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, 2017	$ 11,598	$ 15,114,835	$ 451,621	$ (656,093)	$ 14,921,961		$ 14,921,961
Beginning balance, Shares at Dec. 31, 2017	11,597,991
Translation adjustment				(566,480)	(566,480)		(566,480)
Net income (loss)			2,490,268		2,490,268	(68,551)	2,421,717
Acquisition of EnP Investments LLC						2,759,917	2,759,917
Distributions to noncontrolling interests						(229,135)	(229,135)
Stock-based compensation		111,192			111,192		111,192
Common stock issued	$ 102	102,258			102,360		102,360
Common stock issued, Shares	101,666
Ending 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
Ending balance, Shares at Dec. 31, 2018	11,699,657
Translation adjustment				227,963	227,963		227,963
Net income (loss)			1,912,392		1,912,392	384,793	2,297,185
Distributions to noncontrolling interests						(296,875)	(296,875)
Stock-based compensation		246,444			246,444		246,444
Common stock issued	$ 516	862,744			863,260		863,260
Common stock issued, Shares	515,888
Dividends paid			(2,398,133)		(2,398,133)		(2,398,133)
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