CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	56,739,739	55,643,068
Common stock, shares outstanding	56,739,739	55,643,068