In April 2017, the Company completed an underwritten public offering (the “Offering”) of its common stock in which it sold 5,715,000 shares at a price of $3.50 per share.  Subsequently, in May 2017, and as part of the Offering, the Company completed the sale of 472,846 additional shares of its common stock at the same price upon the exercise of the underwriters’ over-allotment option, for a total of 6,187,846 shares.  The Offering resulted in total net proceeds of $20.0 million, after deduction of underwriting discounts and commissions totaling $1.4 million and other offering expenses totaling $0.2 million.