Shareholders' Equity Equity Issuances (Details) (USD $)	6 Months Ended							6 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	May 08, 2014	Dec. 31, 2013	Jun. 30, 2014 Aspire Capital Purchase Agreement [Member]	Mar. 31, 2014 Aspire Capital Purchase Agreement [Member]	Sep. 28, 2011 Aspire Capital Purchase Agreement [Member]	Jun. 30, 2014 Aegis Capital Purchase Agreement [Member]	Jun. 30, 2014 Aspire Capital Purchase Agreement [Member]	Jun. 30, 2014 Maximum [Member]
Class of Stock [Line Items]
Committment Value Under Purchase Agreement						$ 20,000,000
Term Of Agreement In Months					24		24
Discount Applied To Weighted Average Price					5.00%
Shares, Issued								800,000
Proceeds from Issuance of Common Stock Gross								5,600,000
Common Stock, Shares, Issued	34,939,223		5,329,593	27,196,537					150,000
Purchase Commitment, Remaining Minimum Amount Committed									30,000,000
Stock Issued During Period, Shares, New Issues								700,000
Net proceeds from issuance of common stock	10,149,438	14,248,148						4,400,000
Stock Option Exercise	41,136
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit										$ 6.20
Proceeds from Stock Options Exercised	$ 200,000