CONDENSED BALANCE SHEETS [Parenthetical] - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	550,000,000	550,000,000
Common stock, shares issued	343,774,049	339,374,050
Common stock, shares outstanding	343,774,049	339,374,050