Controlled Equity Offering and Public Offering of Common Stock (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Schedule of Total Sales under Sales Agreement

The following table summarizes the total sales under the Sales Agreement for the periods indicated (in thousands, except per share amounts):

	March 31, 2015
Total shares of common stock sold		733.2
Average price per share	$	2.86
Gross proceeds	$	2,097
Commissions earned by Cantor	$	63
Other issuance costs	$	251