CONDENSED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
CONDENSED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts	$ 45,891	$ 46,484
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	31,500,000	31,500,000
Common stock, shares issued	12,340,654	12,308,432
Common stock, shares outstanding	12,340,654	12,308,432