CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS
Preferred stock, non-cumulative; convertible, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, non-cumulative; convertible, authorized shares	5,000,000	5,000,000
Preferred stock, non-cumulative; convertible, shares issued	0	0
Preferred stock, non-cumulative; convertible, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares	150,000,000	150,000,000
Common stock, shares issued	74,428,087	64,713,695
Common stock, shares outstanding	74,428,087	64,713,695