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Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 128,992 $ 989,065
Less non-cash expenses included in net income:    
Depreciation expense 1,011 467
Depletion expense 109 14,713
Gain on sale of land (80,876) (881,654)
Unrealized gain on equity investment in mutual funds (246)
Changes in operating assets and liabilities:    
Increase (decrease) in current assets (74,941) (58,503)
Increase (decrease) in current liabilities (25,304) (58,956)
Net cash provided by (used in) operating activities (51,255) 5,132
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchases of certificates of deposit (979,000) (2,905,000)
Proceeds from maturity of certificates of deposit 1,670,000 2,192,890
Purchases of mutual funds (2,961)
Costs of reforesting timber (17,970) (40,134)
Proceeds from the sale of fixed assets 109,235 996,494
Net cash provided by investing activities 779,304 244,250
CASH FLOWS FROM FINANCING ACTIVITIES    
Dividends paid 0 (233,099)
Net cash used in financing activities (233,099)
NET INCREASE IN CASH AND RESTRICTED CASH 728,049 16,283
Cash and restricted cash, beginning of the period 1,860,736 1,652,404
Cash and restricted cash, end of the period 2,588,785 1,668,687
SUPPLEMENTAL CASH FLOW INFORMATION    
Cash paid for interest
Cash paid for income taxes $ 67,107 $ 308,387