All of our executive officers, directors and holders of substantially all of our outstanding capital stock are subject to lock-up agreements that restrict their ability to transfer shares of our capital stock for 180 days from the date of the underwriting agreement that was executed in connection with our initial public offering. Such lock-up restrictions expire on or about September 26, 2019. In connection with this offering, our directors, officers and certain stockholders will be subject to additional lock-up restrictions for a period of 180 days following this offering. Future sales, or the possibility that these sales may occur, also might make it more difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate.