Business and Liquidity (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business and Liquidity
The Company incurred net losses attributable to common shareholders in millions		62.8	31.9	27.5
Company has incurred an accumulated deficit in millions		849.4
Expected operating cash burn will be minimum in millions	10
Expected operating cash burn will be maximum in millions	15
Net cash used in operating activities for the year		26.9
Cash and cash equivalents of the company in millions		5	9.4
Company's net working capital in millions		11.1	6.9