Summary of Significant Accounting Policies - EPS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share
Net income (loss)	$ 2,592,193	$ (3,826,605)
Undistributed net income (loss)	(1,278,976)	(6,864,841)
Class K Common Stock
Earnings Per Share
Net income (loss)	1,807,855	(2,660,810)
Common Stock dividends declared and accumulated	2,670,747	2,221,403
Undistributed net income (loss)	$ (862,892)	$ (4,882,213)
Net income (loss) per common share, basic (in dollars per share)	$ 0.47	$ (0.81)
Net income (loss) per common share, diluted (in dollars per share)	$ 0.47	$ (0.81)
Weighted average number of common shares outstanding - basic (in shares)	3,815,288	3,281,469
Weighted average number of common shares outstanding - diluted (in shares)	3,815,288	3,281,469
Class K-I Common Stock
Earnings Per Share
Net income (loss)	$ 511,947	$ (504,295)
Common Stock dividends declared and accumulated	756,291	421,761
Undistributed net income (loss)	$ (244,344)	$ (926,056)
Net income (loss) per common share, basic (in dollars per share)	$ 0.47	$ (0.81)
Net income (loss) per common share, diluted (in dollars per share)	$ 0.47	$ (0.81)
Weighted average number of common shares outstanding - basic (in shares)	1,080,372	622,428
Weighted average number of common shares outstanding - diluted (in shares)	1,080,372	622,428
Class K-T Common Stock
Earnings Per Share
Net income (loss)	$ 26,172	$ (38,783)
Common Stock dividends declared and accumulated	38,663	32,247
Undistributed net income (loss)	$ (12,491)	$ (71,030)
Net income (loss) per common share, basic (in dollars per share)	$ 0.47	$ (0.81)
Net income (loss) per common share, diluted (in dollars per share)	$ 0.47	$ (0.81)
Weighted average number of common shares outstanding - basic (in shares)	55,231	47,741
Weighted average number of common shares outstanding - diluted (in shares)	55,231	47,741
Class A Common Stock
Earnings Per Share
Net income (loss)	$ 274,490	$ (436,740)
Common Stock dividends declared and accumulated	405,468	362,825
Undistributed net income (loss)	$ (130,978)	$ (799,565)
Net income (loss) per common share, basic (in dollars per share)	$ 0.47	$ (0.81)
Net income (loss) per common share, diluted (in dollars per share)	$ 0.47	$ (0.81)
Weighted average number of common shares outstanding - basic (in shares)	579,119	537,410
Weighted average number of common shares outstanding - diluted (in shares)	579,119	537,410
Class B Common Stock
Earnings Per Share
Net income (loss)	$ (28,271)	$ (185,977)
Undistributed net income (loss)	$ (28,271)	$ (185,977)
Net income (loss) per common share, basic (in dollars per share)	$ (0.23)	$ (1.49)
Net income (loss) per common share, diluted (in dollars per share)	$ (0.23)	$ (1.49)
Weighted average number of common shares outstanding - basic (in shares)	125,000	125,000
Weighted average number of common shares outstanding - diluted (in shares)	125,000	125,000