17.  Subsequent Event



On October 19, 2018, the Company closed a registered direct offering of 5,769,231 shares of common stock and warrants to purchase up to 5,769,231 shares of common stock, resulting in gross proceeds to the Company of approximately $7,500,000.  The common stock and warrants were sold in units, consisting of a share of common stock and a warrant to purchase a share of common stock, at a price of $1.30 per unit, with an exercise price for the warrants of $1.67 per share.  The warrants will become exercisable April 19, 2019 and will remain exercisable through April 19, 2024.  The Company also issued warrants to purchase up to 346,154 shares of the Company’s common stock, at an exercise price of $1.625 per share, to designees of the placement agent in the offering.