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Balance Sheets (Current Period Unaudited) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 5,255,957 $ 3,280,289
Certificates of deposit 1,193,604 2,697,000
Equity investment in mutual funds 502,847 500,642
Accounts receivable 80,210 102,786
Prepaid expense and other assets 53,852 39,731
Total current assets 7,086,470 6,620,448
Property and equipment, net 9,235,403 9,242,082
Total assets 16,321,873 15,862,530
Current liabilities:    
Trade payables and accrued expenses 86,367 62,253
Unearned revenue 248,611 165,158
Income tax payable 31,550
Total current liabilities 366,528 227,411
Deferred income tax payable 187,664 187,664
Total liabilities 554,192 415,075
Stockholders' equity:    
Common stock, 3,000,000 authorized, no par value, 1,942,495 issued and outstanding as of September 30, 2020 and December 31, 2019 59,335 59,335
Retained earnings 15,708,346 15,388,120
Total stockholders' equity 15,767,681 15,447,455
Total liabilities and stockholders' equity $ 16,321,873 $ 15,862,530