BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	350,000,000	250,000,000
Common stock, shares issued	216,127,443	214,591,906
Common stock, shares outstanding	216,127,443	214,591,906