CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($)	Redeemable Preferred Stock	Common Stock [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2019	$ 18,319,102	$ 8,512,489	$ 22,213,515	$ 49,045,106
Shares, Issued, Beginning Balance at Dec. 31, 2019	4,662,768	4,964,529
Preferred stock dividends accrued	$ 256,452		(256,452)
Net income			787,082	787,082
Ending balance, value at Mar. 31, 2020	$ 18,575,554	$ 8,512,489	22,744,145	49,832,188
Shares, Issued, Ending Balance at Mar. 31, 2020	4,662,768	4,964,529
Beginning balance, value at Dec. 31, 2019	$ 18,319,102	$ 8,512,489	22,213,515	49,045,106
Shares, Issued, Beginning Balance at Dec. 31, 2019	4,662,768	4,964,529
Net income				2,304,302
Ending balance, value at Sep. 30, 2020	$ 19,088,458	$ 8,512,489	23,748,461	51,349,408
Shares, Issued, Ending Balance at Sep. 30, 2020	4,662,768	4,964,529
Stock compensation expense
Beginning balance, value at Mar. 31, 2020	$ 18,575,554	$ 8,512,489	22,744,145	49,832,188
Shares, Issued, Beginning Balance at Mar. 31, 2020	4,662,768	4,964,529
Preferred stock dividends accrued	$ 256,452		(256,452)
Net income			620,421	620,421
Ending balance, value at Jun. 30, 2020	$ 18,832,006	$ 8,512,489	23,108,114	50,452,609
Shares, Issued, Ending Balance at Jun. 30, 2020	4,662,768	4,964,529
Preferred stock dividends accrued	$ 256,452		(256,452)
Net income			896,799	896,799
Ending balance, value at Sep. 30, 2020	$ 19,088,458	$ 8,512,489	23,748,461	51,349,408
Shares, Issued, Ending Balance at Sep. 30, 2020	4,662,768	4,964,529
Beginning balance, value at Dec. 31, 2020	$ 25,817,305	$ 8,512,489	24,492,133	58,821,927
Shares, Issued, Beginning Balance at Dec. 31, 2020	6,309,508	4,964,529
Issuance of preferred stock, net	$ 1,089,191			1,089,191
Stock Issued During Period, Shares, New Issues	229,333
Preferred stock dividends accrued	$ 359,636		(359,636)
Net income			122,685	122,685
Ending balance, value at Mar. 31, 2021	$ 27,266,132	8,512,489	24,255,182	60,033,803
Shares, Issued, Ending Balance at Mar. 31, 2021	6,538,841
Beginning balance, value at Dec. 31, 2020	$ 25,817,305	$ 8,512,489	24,492,133	58,821,927
Shares, Issued, Beginning Balance at Dec. 31, 2020	6,309,508	4,964,529
Net income				1,656,427
Ending balance, value at Sep. 30, 2021	$ 27,935,401	$ 8,512,489	25,065,347	61,513,237
Shares, Issued, Ending Balance at Sep. 30, 2021	6,564,923	4,964,529
Stock compensation expense				22,914
Beginning balance, value at Mar. 31, 2021	$ 27,266,132	$ 8,512,489	24,255,182	60,033,803
Shares, Issued, Beginning Balance at Mar. 31, 2021	6,538,841
Issuance of preferred stock, net	$ (77,222)			(77,222)
Stock Issued During Period, Shares, New Issues	26,082
Preferred stock dividends accrued	$ 362,506		(362,506)
Net income			1,077,551	1,077,551
Ending balance, value at Jun. 30, 2021	$ 27,551,416	$ 8,512,489	24,970,227	61,034,132
Shares, Issued, Ending Balance at Jun. 30, 2021	6,564,923	4,964,529
Preferred stock dividends accrued	$ 361,071		(361,071)
Net income			456,191	456,191
Ending balance, value at Sep. 30, 2021	$ 27,935,401	$ 8,512,489	25,065,347	61,513,237
Shares, Issued, Ending Balance at Sep. 30, 2021	6,564,923	4,964,529
Stock compensation expense	$ 22,914			$ 22,914