Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
LIABILITIES AND STOCKHOLDERS` EQUITY
Common stock, $0.01 par value, authorized 20,000,000 shares; issued 14,601,487 and 14,460,486, respectively; outstanding 14,519,215 and 14,450,470, respectively; at September 30, 2023 and December 31, 2022	$ 146,015	$ 144,605
Additional paid-in capital	40,151,794	39,726,851
Accumulated deficit	(22,894,307)	(24,125,092)
Less cost of 82,272 and 10,016 common shares repurchased, respectively; at September 30, 2023 and December 31, 2022	(250,138)	(40,848)
Total stockholders` equity	17,153,364	15,705,516
Total liabilities and stockholders` equity	22,511,259	21,679,943
Current liabilities:
Note payable, current portion	57,457	43,711
Accounts payable	2,151,127	1,836,865
Accrued expenses	1,067,293	820,856
Deferred revenue	1,675,086	2,521,128
Lease liability, current portion	159,000	157,000
Total current liabilities	5,109,963	5,379,560
Note payable less current portion	8,655	54,847
Deferred revenue-long term	31,277	231,020
Lease liability less current portion	208,000	309,000
Total liabilities	5,357,895	5,974,427
Commitments (note 4)