|6 Months Ended|
Jun. 30, 2018
In 2013, the Company issued warrants exercisable for 1,124,026 shares of Series B preferred stock, at an exercise price of $0.90 per share, to certain existing investors in conjunction with a private placement (the 2013 Warrants) and warrants exercisable for 111,112 shares of Series B preferred stock, at an exercise price of $0.90 per share, to Oxford Finance LLC and Silicon Valley Bank in conjunction with the Company’s entry into a loan and security agreement (the Lender Warrants). Upon completion of the Company’s initial public offering (IPO), the 2013 Warrants and the Lender Warrants became exercisable for 136,236 and 13,468 shares of common stock, respectively, at an exercise price of $7.43 per share. The 2013 Warrants expired on May 30, 2018, and the Lender Warrants will expire on July 3, 2023.
The following table summarizes the Company’s stock option activity under all stock option plans for the six months ended June 30, 2018 (options in thousands):
The Company recorded stock-based compensation of $0.9 million and $0.8 million for the three months ended June 30, 2018 and 2017, respectively, and $1.9 million and $2.1 million for the six months ended June 30, 2018 and 2017, respectively.
Common Stock Reserved for Future Issuance
The following shares of common stock were reserved for future issuance at June 30, 2018 (in thousands):
The entire disclosure for accounts comprising shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income, and compensation-related costs for equity-based compensation. Includes, but is not limited to, disclosure of policies, compensation plan details, equity-based arrangements to obtain goods and services, deferred compensation arrangements, and employee stock purchase plan details.
Reference 1: http://www.xbrl.org/2003/role/presentationRef