Shareholders' Equity Equity Issuances (Details) (USD $) In Millions, except Share data, unless otherwise specified			0 Months Ended			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2012 Private Placement [Member]	Mar. 31, 2014 Aspire Capital Purchase Agreement [Member]	Sep. 28, 2011 Aspire Capital Purchase Agreement [Member]	Mar. 31, 2014 Aegis Capital Purchase Agreement [Member]	Mar. 31, 2014 Aspire Capital Purchase Agreement [Member]
Class of Stock [Line Items]
Committment Value Under Purchase Agreement					$ 20.0
Term Of Agreement In Months					24
Discount Applied To Weighted Average Price				5.00%
Investment Warrants, Exercise Price			$ 5.10
Shares, Issued						800,000
Proceeds from Issuance of Common Stock Gross						5.6
Common Stock, Shares, Issued	28,593,410	27,196,537					150,000
Purchase Commitment, Remaining Minimum Amount Committed							$ 30.0