|9 Months Ended|
Sep. 30, 2019
On January 14, 2019, we issued 31,111 warrants to purchase common stock at $7.43 per share. The warrants are immediately exercisable and expire on January 9, 2024. On January 31, 2019 we issued 35,507 warrants to purchase common stock at $7.59 per share. These warrants are immediately exercisable and expire on January 26, 2024. All of these warrants were issued in conjunction with the 2019 Offerings.
During the three and nine months ended September 30, 2019, 122,500 warrants issued as part of a public offering of the Company's common stock and warrants in December 2017 (the "2017 Offering") expired unexercised.
The following table summarizes the warrant activity for the nine months ended September 30, 2019 (in thousands, except exercise price):