Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock Including Additional Paid in Capital [Member] Common Class A [Member]	Common Stock Including Additional Paid in Capital [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member] Common Class A [Member]	Treasury Stock [Member] Common Class B [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Common Stock Outstanding [Member] Common Class A [Member]	Common Stock Outstanding [Member] Common Class B [Member]	Total
Balance at Dec. 31, 2019	$ 3,599,806	$ 1,465,522	$ 1,741,901			$ (1,905,780)	$ 16,527,083			$ 21,428,532
Share-based compensation expense	55,758	0	0			0	0			55,758
Stock awards	211,050	0	0			0	0			211,050
Net Income	$ 0	$ 0	0			0	2,304,407			2,304,407
Balance (in shares) at Dec. 31, 2019	2,576,837	954,283		37,208	182,435			2,539,629	771,848
Repurchase of shares	$ 0	$ 0	0			(29,032)	0			(29,032)
Stock awards (in shares)	15,000	0		0	0			15,000	0
Repurchase of shares (in shares)	0	0		1,727	0			(1,727)	0
Stock awards	$ 211,050	$ 0	0			0	0			211,050
Net Income	0	0	0			0	2,304,407			2,304,407
Repurchase of shares	0	0	0			(29,032)	0			(29,032)
Balance at Jun. 30, 2020	$ 3,866,614	$ 1,465,522	1,741,901			(1,934,812)	18,831,490			23,970,715
Balance (in shares) at Jun. 30, 2020	2,591,837	954,283		38,935	182,435			2,552,902	771,848
Balance at Mar. 31, 2020	$ 3,636,272	$ 1,465,522	1,741,901			(1,905,780)	18,602,653			23,540,568
Share-based compensation expense	19,292	0	0			0	0			19,292
Stock awards	211,050	0	0			0	0			211,050
Net Income	$ 0	$ 0	0			0	228,837			228,837
Balance (in shares) at Mar. 31, 2020	2,576,837	954,283		37,208	182,435			2,539,629	771,848
Repurchase of shares	$ 0	$ 0	0			(29,032)	0			(29,032)
Stock awards (in shares)	15,000	0		0	0			15,000	0
Repurchase of shares (in shares)	0	0		1,727	0			(1,727)	0
Stock awards	$ 211,050	$ 0	0			0	0			211,050
Net Income	0	0	0			0	228,837			228,837
Repurchase of shares	0	0	0			(29,032)	0			(29,032)
Balance at Jun. 30, 2020	$ 3,866,614	$ 1,465,522	1,741,901			(1,934,812)	18,831,490			23,970,715
Balance (in shares) at Jun. 30, 2020	2,591,837	954,283		38,935	182,435			2,552,902	771,848
Balance at Dec. 31, 2020	$ 3,896,705	$ 1,465,522	1,741,901			(1,938,052)	22,366,470			27,532,546
Share-based compensation expense	30,000	0	0			0	0			30,000
Stock awards	379,876	0	0			0	0			379,876
Net Income	$ 0	$ 0	0			0	4,390,722			4,390,722
Balance (in shares) at Dec. 31, 2020	2,595,087	954,283		39,467	182,435			2,555,620	771,848
Share conversion, shares issued (in shares)	40,000
Share conversion, shares converted (in shares)		(40,000)
Share conversion (in shares)				0	0			40,000	(40,000)
Repurchase of shares	$ 0	$ 0	0			(41,033)	0			(41,033)
Stock awards (in shares)	23,700	0		0	0			23,700	0
Repurchase of shares (in shares)	0	0		2,262	0			(2,262)	0
Stock awards	$ 379,876	$ 0	0			0	0			379,876
Issuance for acquisition	1,059,000									1,059,000
Net Income	$ 0	$ 0	0			0	4,390,722			4,390,722
Acquisition (in shares)	60,000	0			0			60,000	0
Stock conversion, shares issued (in shares)	40,000
Stock conversion, shares converted (in shares)		(40,000)
Stock conversion (in shares)				0	0			40,000	(40,000)
Repurchase of shares	$ 0	$ 0	0			(41,033)	0			(41,033)
Balance at Jun. 30, 2021	$ 5,365,581	$ 1,465,522	1,741,901			(1,979,085)	26,757,193			33,351,112
Balance (in shares) at Jun. 30, 2021	2,718,787	914,283		41,729	182,435			2,677,058	731,848
Balance at Mar. 31, 2021	$ 5,285,333	$ 1,465,522	1,741,901			(1,979,085)	25,509,887			32,023,559
Share-based compensation expense	14,333	0	0			0	0			14,333
Stock awards	65,915	0	0			0	0			65,915
Net Income	$ 0	$ 0	0			0	1,247,305			1,247,305
Balance (in shares) at Mar. 31, 2021	2,678,787	954,283		41,729	182,435			2,637,058	771,848
Share conversion, shares issued (in shares)	40,000
Share conversion, shares converted (in shares)		(40,000)
Share conversion (in shares)				0	0			40,000	(40,000)
Stock awards	$ 65,915	$ 0	0			0	0			65,915
Net Income	$ 0	$ 0	0			0	1,247,305			1,247,305
Stock conversion, shares issued (in shares)	40,000
Stock conversion, shares converted (in shares)		(40,000)
Stock conversion (in shares)				0	0			40,000	(40,000)
Balance at Jun. 30, 2021	$ 5,365,581	$ 1,465,522	$ 1,741,901			$ (1,979,085)	$ 26,757,193			$ 33,351,112
Balance (in shares) at Jun. 30, 2021	2,718,787	914,283		41,729	182,435			2,677,058	731,848