Summary of Significant Accounting Policies - EPS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Earnings Per Share
Net income attributable to common stockholders	$ 1,537,203	$ 1,540,403
Undistributed net income (loss)	$ (2,574,049)	(2,565,175)
Director | Restricted K shares | Procaccianti Convertible Fund, LLC (PCF)
Earnings Per Share
Number of shares issued and participate in dividends	2,250
Class K Common Stock
Earnings Per Share
Net income attributable to common stockholders	$ 1,048,752	1,059,676
Common Stock dividends declared and accumulated	2,710,194	2,729,491
Undistributed net income (loss)	$ (1,661,442)	$ (1,669,815)
Net income (loss) per common share, basic (in dollars per share)	$ 0.27	$ 0.27
Net income (loss) per common share, diluted (in dollars per share)	$ 0.27	$ 0.27
Weighted average number of common shares outstanding - basic (in shares)	3,871,433	3,899,295
Weighted average number of common shares outstanding - diluted (in shares)	3,871,433	3,899,295
Class K-I Common Stock
Earnings Per Share
Net income attributable to common stockholders	$ 384,624	$ 375,910
Common Stock dividends declared and accumulated	994,071	968,225
Undistributed net income (loss)	$ (609,447)	$ (592,315)
Net income (loss) per common share, basic (in dollars per share)	$ 0.27	$ 0.27
Net income (loss) per common share, diluted (in dollars per share)	$ 0.27	$ 0.27
Weighted average number of common shares outstanding - basic (in shares)	1,420,109	1,383,153
Weighted average number of common shares outstanding - diluted (in shares)	1,420,109	1,383,153
Class K-T Common Stock
Earnings Per Share
Net income attributable to common stockholders		$ 339
Common Stock dividends declared and accumulated		875
Undistributed net income (loss)		$ (536)
Net income (loss) per common share, basic (in dollars per share)		$ 0.27
Net income (loss) per common share, diluted (in dollars per share)		$ 0.27
Weighted average number of common shares outstanding - basic (in shares)		1,251
Weighted average number of common shares outstanding - diluted (in shares)		1,251
Class A Common Stock
Earnings Per Share
Net income attributable to common stockholders	$ 157,472	$ 158,007
Common Stock dividends declared and accumulated	406,987	406,987
Undistributed net income (loss)	$ (249,515)	$ (248,980)
Net income (loss) per common share, basic (in dollars per share)	$ 0.27	$ 0.27
Net income (loss) per common share, diluted (in dollars per share)	$ 0.27	$ 0.27
Weighted average number of common shares outstanding - basic (in shares)	581,410	581,410
Weighted average number of common shares outstanding - diluted (in shares)	581,410	581,410
Class B Common Stock
Earnings Per Share
Net income attributable to common stockholders	$ (53,645)	$ (53,529)
Undistributed net income (loss)	$ (53,645)	$ (53,529)
Net income (loss) per common share, basic (in dollars per share)	$ (0.43)	$ (0.43)
Net income (loss) per common share, diluted (in dollars per share)	$ (0.43)	$ (0.43)
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