Shareholders' Equity (Details) (Warrant [Member], USD $)	12 Months Ended
	Dec. 31, 2014
Warrant [Member]
Additional information for warrants outstanding
Number of warrants, Outstanding at December 31, 2013	24,496,664
Weighted average exercise price, Outstanding at December 31, 2013	$ 0.94
Number of warrants, Issued	0
Weighted average exercise price, Issued	$ 0.00
Number of warrants, Exercised	(3,064,317)
Weighted average exercise price, Exercised	$ 2.29
Number of warrants, Expired	(2,601)
Weighted average exercise price, Expired	$ 0.01
Outstanding and Exercisable at December 31, 2014	21,429,746
Weighted average exercise price, Outstanding and Exercisable at December 31, 2014	$ 0.75