Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock^{F1,F2,F3,F4,F5,F6}	Jun 30, 2015	C	2,057,190	—	A	2,057,190	D
Common Stock^{F2,F3,F4,F5,F6}	Jun 30, 2015	M	20,470	$7.65	A	2,077,660	D
Common Stock^{F2,F3,F4,F5,F6}	Jun 30, 2015	F	8,700	$18.00	D	2,068,960	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Series A Preferred Stock^{F2,F3,F4,F5,F6,F1}	—	Jun 30, 2015	C	585,958	D	—	—	Common Stock	585,958	D
Series B Preferred Stock^{F2,F3,F4,F5,F6,F1}	—	Jun 30, 2015	C	925,926	D	—	—	Common Stock	925,926	D
Series C Preferred Stock^{F2,F3,F4,F5,F6,F1}	—	Jun 30, 2015	C	440,178	D	—	—	Common Stock	440,178	D
Series D Preferred Stock^{F2,F3,F4,F5,F6,F1}	—	Jun 30, 2015	C	105,128	D	—	—	Common Stock	105,128	D
Warrant^{F2,F3,F4,F5,F6,F7,F1}	$7.65	Jun 30, 2015	M	20,470	D	—	—	Series D Preferred Stock	20,470	D

Explanation of responses

F1All outstanding Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering (the "IPO") for no additional consideration. The Preferred Stock had no expiration date.
F2The securities reported as directly beneficially owned by the designated Reporting Person may be deemed to be indirectly beneficially owned by each of the Reporting Owners listed below, each of whom is a managing member of One Palmer Square Associates IV, LLC, the sole general partner of the designated Reporting Person. Pursuant to Instruction 4(b)(iv) of Form 4, each such individual has elected to report as indirectly beneficially owned the entire number of securities owned by the designated Reporting Person, however each of them disclaims beneficial ownership of any securities, and any proceeds thereof, that exceed his or her pecuniary interest therein and/or that are not actually distributed to him or her.
F3As managing members of the sole general partner of DP IV Associates, L.P., each Reporting Owner listed below may also be deemed to indirectly beneficially own the securities of the Issuer held by DP IV Associates, L.P., as reported on a Form 4 for DP IV Associates, L.P. filed on the same date as this Form 4.
F4As managing members of the sole general partner of Domain Partners VIII, L.P., each Reporting Owner listed below may also be deemed to indirectly beneficially own the securities of the Issuer held by Domain Partners VIII, L.P., as reported on a Form 4 for Domain Partners VIII, L.P. filed on the same date as this Form 4.
F5As managing members of the sole general partner of DP VIII Associates, L.P., each Reporting Owner listed below may also be deemed to indirectly beneficially own the securities of the Issuer held by DP VIII Associates, L.P., as reported on a Form 4 for DP VIII Associates, L.P. filed on the same date as this Form 4.
F6As managing members of Domain Associates, LLC, each Reporting Owner listed below may also be deemed to indirectly beneficially own 63,200 shares of Common Stock held by Domain Associates, LLC. Pursuant to Instruction 4(b)(iv) of Form 4, each such individual has elected to report as indirectly beneficially owned the entire number of securities owned by Domain Associates, LLC, however each of them disclaims beneficial ownership of any securities, and any proceeds thereof, that exceed his or her pecuniary interest therein and/or that are not actually distributed to him or her.
F7The Warrant was automatically net exercised based on the IPO price of $18 per share immediately prior to the completion of the IPO.