CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
CONSOLIDATED BALANCE SHEETS    
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized 500,000,000 500,000,000
Common stock, shares issued 24,402,371 24,305,381
Common stock, shares outstanding 24,402,371 24,305,381