Shareholders' Equity Equity Issuances (Details) - USD ($)	1 Months Ended	9 Months Ended
	Nov. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	May. 01, 2015	Dec. 31, 2014	Jun. 30, 2014	May. 08, 2014
Class of Stock [Line Items]
Common Stock, Shares, Issued		55,497,240			36,783,857		5,329,593
Net proceeds from issuance of common stock		$ 36,136,839	$ 11,275,109
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Other		12,500,000
Fair Value Inputs, Offered Quotes		$ 2.00
Net proceeds from issuance of common stock		$ 28,800,000
Aspire Capital Purchase Agreement [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues		3,000,000
Net proceeds from issuance of common stock		$ 9,400,000
Over-Allotment Option [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Other		1,875,000
March 2014 Purchase Agreement [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Other		5,100,000
Net proceeds from issuance of common stock		$ 20,300,000
Aspire Capital Purchase Agreement [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		364,837				150,000
Purchase Commitment, Remaining Minimum Amount Committed				$ 30,000,000		$ 30,000,000
Subsequent Event [Member] | Aspire Capital Purchase Agreement [Member]
Class of Stock [Line Items]
Term of agreement in months	24 months
Purchase Commitment, Remaining Minimum Amount Committed	$ 30,000,000
Purchase Commitment, Maximum Amount Committed, Shares	11,019,276
Stock Issued During Period, Shares, Other	842,696
Discount Applied To Weighted Average Price	5.00%