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]	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, 2018					$ (1,905,780)			$ 2,641,300	$ 710,272	$ 1,741,901	$ 9,577,792	$ 12,765,485
Share-based compensation expense								348,877				348,877
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)
Net Income											6,979,863	6,979,863
Balance at Dec. 31, 2019					(1,905,780)			3,599,806	1,465,522	1,741,901	16,527,083	21,428,532
Balance (in shares) at Dec. 31, 2018	2,161,014	779,283	37,208	182,435		2,123,806	596,848
Stock Awards (in shares)	64,334					64,334
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	2,576,837	954,283	37,208	182,435		2,539,629	771,848
Share-based compensation expense								36,466				36,466
Net Income											2,075,570	2,075,570
Balance at Mar. 31, 2020					$ (1,905,780)			$ 3,636,272	$ 1,465,522	$ 1,741,901	$ 18,602,653	$ 23,540,568
Stock Awards (in shares)
Warrant exercise (in shares)
Note conversion (in shares)
Balance (in shares) at Mar. 31, 2020	2,576,837	954,283	37,208	182,435		2,539,629	771,848