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Description of Business and Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Description of Business and Summary of Significant Accounting Policies (Textual)
Accumulated deficit	$ (204,155,126)		$ (204,155,126)		$ (186,857,238)
Net loss	(6,599,326)	$ (6,148,089)	(17,296,619)	$ (17,334,216)
Cash and cash equivalents	$ 14,312,909	$ 14,805,472	$ 14,312,909	$ 14,805,472	$ 13,673,308

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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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