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Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 426,807 $ 58,382
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation expense 507 234
Depletion expense 77 134
Gain on sale of land (406,220) (33,107)
Unrealized loss on equity investment in mutual funds 3,010
Changes in operating assets and liabilities:    
(Increase) decrease in current assets (125,141) (83,854)
Increase (decrease) in current liabilities (47,005) 76,944
Net cash provided by (used in) operating activities (150,975) 21,743
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchases of certificates of deposit (1,210,163)
Proceeds from maturity of certificates of deposit 744,000
Purchases of mutual funds (124) (1,978)
Costs of reforesting timber (14,114)
Proceeds from the sale of fixed assets 537,360 33,265
Net cash provided by (used in) investing activities 523,122 (434,876)
NET INCREASE IN CASH AND CASH EQUIVALENTS 372,147 (413,133)
Cash and cash equivalents, beginning of the period 6,463,255 3,280,289
Cash and cash equivalents, end of the period 6,835,402 2,867,156
SUPPLEMENTAL CASH FLOW INFORMATION    
Cash paid for interest
Cash paid for income taxes