Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Common stock, shares authorized	300,000,000	300,000,000
Common stock, par value per share	$ 0.005	$ 0.005
Common stock, shares issued	51,188,990	49,828,942
Common stock, shares outstanding	51,188,990	49,828,942