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Balance Sheets (Current Period Unaudited) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Current assets:    
Cash $ 2,940,360 $ 1,860,736
Certificates of deposit 3,173,000 3,370,000
Equity investment in mutual funds 249,436 244,825
Accounts receivable 111,388 118,463
Prepaid expense and other assets 86,362 36,989
Total current assets 6,560,546 5,631,013
Long-term certificate of deposit 725,000
Property and equipment, net 9,238,383 9,245,988
Total assets 15,798,929 15,602,001
Current liabilities:    
Trade payables and accrued expenses 132,041 146,268
Unearned revenue 94,740 58,893
Income tax payable 11,654
Total current liabilities 226,781 216,815
Deferred income tax payable 187,664 187,664
Total liabilities 414,445 404,479
Stockholders' equity:    
Common stock, 3,000,000 authorized, no par value, 1,942,495 issued and outstanding as of September 30, 2019 and December 31, 2018 59,335 59,335
Retained earnings 15,325,149 15,138,187
Total stockholders' equity 15,384,484 15,197,522
Total liabilities and stockholders' equity $ 15,798,929 $ 15,602,001