Consolidated Statements of Shareholders' Equity (Deficit) (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2013	Feb. 28, 2015	Dec. 31, 2014
Common stock issued for licensing rights
Common stock issued for licensing rights (in usd per share)	$ 2.41
Common stock and warrants issued for cash
Common stock and warrants issued for cash (in usd per share)		$ 0.60
Offer and Sale
Common stock issued through controlled equity offering (in usd per share)	$ 2.82		$ 0.92