Stockholders' Equity (Common Stock) (Details) (USD $)	Jan. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Common stock, shares authorized (in shares)	250,000,000	125,000,000	125,000,000
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Common stock, shares outstanding (in shares)		61,748,524	51,143,906