Summary of Significant Accounting Policies - EPS (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share
Net income (loss)	$ 2,324,251	$ 1,052,074	$ 2,007,793	$ (58,599)
Undistributed net income (loss)	1,294,685	108,633	(41,810)	(1,869,401)
Class K Common Stock
Earnings Per Share
Net income (loss)	1,529,475	730,429	1,339,424	(10,598)
Common Stock dividends declared and accumulated	685,431	656,539	1,366,725	1,284,883
Undistributed net income (loss)	$ 844,044	$ 73,890	$ (27,301)	$ (1,295,481)
Net income (loss) per common share, basic (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Net income (loss) per common share, diluted (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Weighted average number of common shares outstanding - basic (in shares)	3,927,565	3,761,959	3,937,320	3,701,519
Weighted average number of common shares outstanding - diluted (in shares)	3,927,565	3,761,959	3,937,320	3,701,519
Shares held by the Company's independent directors			3,750
Class K-I Common Stock
Earnings Per Share
Net income (loss)	$ 516,703	$ 196,335	$ 449,877	$ (2,544)
Common Stock dividends declared and accumulated	231,555	176,474	459,047	308,412
Undistributed net income (loss)	$ 285,148	$ 19,861	$ (9,170)	$ (310,956)
Net income (loss) per common share, basic (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Net income (loss) per common share, diluted (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Weighted average number of common shares outstanding - basic (in shares)	1,326,870	1,011,194	1,322,463	888,479
Weighted average number of common shares outstanding - diluted (in shares)	1,326,870	1,011,194	1,322,463	888,479
Class K-T Common Stock
Earnings Per Share
Net income (loss)	$ 24,795	$ 9,967	$ 21,570	$ (142)
Common Stock dividends declared and accumulated	11,112	8,960	22,010	17,205
Undistributed net income (loss)	$ 13,683	$ 1,007	$ (440)	$ (17,347)
Net income (loss) per common share, basic (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Net income (loss) per common share, diluted (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Weighted average number of common shares outstanding - basic (in shares)	63,669	51,338	63,407	49,563
Weighted average number of common shares outstanding - diluted (in shares)	63,669	51,338	63,407	49,563
Class A Common Stock
Earnings Per Share
Net income (loss)	$ 226,415	$ 112,888	$ 197,789	$ (1,567)
Common Stock dividends declared and accumulated	101,468	101,468	201,821	200,302
Undistributed net income (loss)	$ 124,947	$ 11,420	$ (4,032)	$ (201,869)
Net income (loss) per common share, basic (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Net income (loss) per common share, diluted (in dollars per share)	$ 0.39	$ 0.19	$ 0.34	$ 0.00
Weighted average number of common shares outstanding - basic (in shares)	581,410	581,410	581,410	576,791
Weighted average number of common shares outstanding - diluted (in shares)	581,410	581,410	581,410	576,791
Class B Common Stock
Earnings Per Share
Net income (loss)	$ 26,863	$ 2,455	$ (867)	$ (43,748)
Undistributed net income (loss)	$ 26,863	$ 2,455	$ (867)	$ (43,748)
Net income (loss) per common share, basic (in dollars per share)	$ 0.21	$ 0.02	$ (0.01)	$ (0.35)
Net income (loss) per common share, diluted (in dollars per share)	$ 0.21	$ 0.02	$ (0.01)	$ (0.35)
Weighted average number of common shares outstanding - basic (in shares)	125,000	125,000	125,000	125,000
Weighted average number of common shares outstanding - diluted (in shares)	125,000	125,000	125,000	125,000