CONDENSED CONSOLIDATED BALANCE SHEETS [Parenthetical] - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized	75,000,000	75,000,000
Common stock, shares issued	38,823,464	32,657,257
Common stock, shares outstanding	38,823,464	32,657,257