CONDENSED BALANCE SHEETS [Parenthetical] - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	172,786,907	172,683,342
Common stock, shares outstanding	172,786,907	172,683,342