CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Jun. 30, 2013	Dec. 31, 2012
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	55,444,779	52,482,598
Common stock, shares outstanding	55,444,779	52,482,598