Subsequent Events (Details) - ATM Agreement [Member] - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended	14 Months Ended
	Nov. 09, 2016	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2016
Subsequent Event [Line Items]
Aggregate proceeds from sales of common stock		$ 910	$ 15,079	$ 18,456
Common Stock [Member]
Subsequent Event [Line Items]
Number of shares of common stock sold (in shares)		224,944	3,304,873	4,139,929
Sales commissions, fees and other costs associated with issuance of common stock		$ 27	$ 452	$ 554
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate proceeds from sales of common stock	$ 848
Sales commissions, fees and other costs associated with issuance of common stock	$ 25
Subsequent Event [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Number of shares of common stock sold (in shares)	276,550
Average sales price per common share (in dollars per share)	$ 3.07