Shelf Registration Statement (Details Textual) - USD ($) $ / shares in Units, shares in Thousands		2 Months Ended	9 Months Ended
	Apr. 23, 2015	Jun. 11, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 03, 2014
Stock Offering (Textual) [Abstract]
Aggregate value of securities permitted for issuance (up to $125 million)					$ 125,000,000
Proceeds from sale of common stock, net of offering costs			$ 0	$ 9,565,000
Cowen and Company | Equity Offering Sales Agreement under Shelf Registration Statement
Stock Offering (Textual) [Abstract]
Number of shares the Company may sell per equity offering sales agreement (up to $10 million)	$ 10,000,000.0
Percentage commission of gross proceeds	3.00%
Amount of common stock sold		$ 10,000,000
Common stock, shares issued		1,830
Proceeds from sale of common stock, net of offering costs		$ 9,600,000
Commissions and offering costs		$ 400,000
Cowen and Company | Equity Offering Sales Agreement under Shelf Registration Statement | Average
Stock Offering (Textual) [Abstract]
Average share price		$ 5.46