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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Cash flows from operating activities    
Net income $ 1,715,627 $ 2,039,337
Adjustments to reconcile net income to net cash provided by operating activities    
Depreciation and amortization 1,223,865 1,225,290
Unrealized loss (gain) on marketable equity securities 135,497 (403,935)
Unrealized loss on interest rate cap premium 18,276 40,113
Amortization of loan procurement costs 84,911 97,458
Stock-based compensation 243,902 218,136
Changes in operating assets and liabilities:    
Accounts receivable 22,899 41,982
Prepaid expenses and other assets (237,547) (173,919)
Accounts payable and accrued expenses 246,591 (16,269)
Net cash provided by operating activities 3,454,021 3,068,193
Cash flows from investing activities    
Improvements and equipment additions (208,570) (62,440)
Net cash used in investing activities (208,570) (62,440)
Cash flows from financing activities    
Principal payments on note payable (451,647) (433,137)
Dividends paid (2,459,280) (2,438,864)
Issuance costs on renewal of revolving line of credit   (235,164)
Net cash used in financing activities (2,910,927) (3,107,165)
Net increase (decrease) in cash, cash equivalents, and restricted cash 334,524 (101,412)
Cash, cash equivalents, and restricted cash, beginning of period 7,210,061 7,028,546
Cash, cash equivalents, and restricted cash, end of period 7,544,585 6,927,134
Supplemental cash flow and noncash information    
Cash paid for interest 517,646 536,156
Supplemental disclosure of noncash activities:    
Dividends payable $ 3,440 $ 3,420