Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Liquidity (Details) - USD ($)	Nov. 11, 2015	Jul. 28, 2015	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Liquidity
Accumulated deficit			$ 443,797,195	$ 430,121,078
Negative working capital			6,882,000
Cash and cash equivalents			$ 333,670	$ 1,777,414	$ 4,332,781	$ 2,120,102
Subsequent Event \| Shelf Registration 2015 \| Common Stock
Financing [Line Items]
Proceeds from issuances of common stock, gross amount remaining	$ 1,016,000
Global Restructuring
Financing [Line Items]
Reduction in workforce (percentage)		60.00%