2015 Merck GHI financing (Details Textual) - USD ($)		9 Months Ended
	Jul. 14, 2015	Sep. 30, 2016	Sep. 30, 2015
Common Stock and Note Purchase Agreement [Line Items]
Proceeds from issuance of common stock, net of issuance costs		$ 124	$ 4,958,335
Merck GHI Financing Agreement [Member]
Common Stock and Note Purchase Agreement [Line Items]
Stock Issued During Period, Shares, New Issues	1,136,364
Shares Issued, Price Per Share	$ 4.40
Proceeds from issuance of common stock, net of issuance costs	$ 5,000,000
Debt Instrument, Interest Rate, Stated Percentage	8.00%
Debt Instrument, Face Amount	$ 1,000,000
Fees Related to Common Stock and Debt Transaction	50,000
Deferred Debt Issuance Costs	8,000
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	$ 42,000