Consolidated Statements of Stockholders' Equity - 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]	Treasury Stock [Member] Common Class A [Member]	Treasury Stock [Member] Common Class B [Member]	Treasury Stock [Member]	Common Stock Outstanding [Member] Common Class A [Member]	Common Stock Outstanding [Member] Common Class B [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2017					$ (264,841)			$ 2,246,367	$ 710,272	$ 1,741,901	$ 5,964,082	$ 10,397,781
Share-based compensation expense								394,933				394,933
Repurchase of Class B Shares					(1,640,939)							(1,640,939)
Net Income											3,613,710	3,613,710
Balance at Dec. 31, 2018					(1,905,780)			2,641,300	710,272	1,741,901	9,577,792	12,765,485
Balance (in shares) at Dec. 31, 2017	2,130,681	779,283	15,795	667		2,114,886	778,616
Stock Awards (in shares)	30,333					30,333
Repurchase of shares (in shares)			21,413	181,768		(21,413)	(181,768)
Balance (in shares) at Dec. 31, 2018	2,161,014	779,283	37,208	182,435		2,123,806	596,848
Share-based compensation expense								348,877				348,877
Net Income											6,979,863	6,979,863
Warrant exercise								250,000				250,000
Note conversion								359,629	755,250			1,114,879
Cumulative effect of accounting change related to lease standard											(30,572)	(30,572)
Balance at Dec. 31, 2019					$ (1,905,780)			$ 3,599,806	$ 1,465,522	$ 1,741,901	$ 16,527,083	$ 21,428,532
Stock Awards (in shares)	41,000					41,000
Warrant exercise (in shares)	100,000					100,000
Note conversion (in shares)	251,489	175,000				251,489	175,000
Balance (in shares) at Dec. 31, 2019	2,553,503	954,283	37,208	182,435		2,516,295	771,848