Nature of Operations (Details) (USD $)	3 Months Ended		12 Months Ended			0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 02, 2014	Sep. 30, 2014
Description of Business
Net loss attributable to common shareholders	$ 11,077,851	$ 75,909,008	$ 88,600,000	$ 62,800,000	$ 31,900,000
Accumulated deficit	949,158,617		938,080,766
Net cash used in operating activities	13,644,836	8,887,010
Cash and cash equivalents	131,537,210	63,231,651	146,205,071	5,026,523
Net working capital				$ 167,000,000			$ 155,700,000
ReliOn
Description of Business
Number of shares of common stock issued						530,504
Share price (in dollars per share)						$ 7.54