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Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 270,172 $ 128,992
Less non-cash expenses included in net income:    
Depreciation expense 467 1,011
Depletion expense 184 109
Gain on sale of land (253,907) (80,876)
Unrealized loss (gain) on equity investment in mutual funds 1,503 (246)
Changes in operating assets and liabilities:    
Increase (decrease) in current assets (37,758) (74,941)
Increase (decrease) in current liabilities 111,381 (25,304)
Net cash provided by (used in) operating activities 92,042 (51,255)
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchases of certificates of deposit (1,985,465) (979,000)
Proceeds from maturity of certificates of deposit 1,929,000 1,670,000
Purchases of mutual funds (3,175) (2,961)
Costs of reforesting timber (17,970)
Proceeds from the sale of fixed assets 254,458 109,235
Net cash provided by (used in) investing activities 194,818 779,304
NET INCREASE IN CASH AND RESTRICTED CASH 286,860 728,049
Cash and restricted cash, beginning of the period 3,280,289 1,860,736
Cash and restricted cash, end of the period 3,567,149 2,588,785
SUPPLEMENTAL CASH FLOW INFORMATION    
Cash paid for interest
Cash paid for income taxes $ 5,000 $ 67,107