Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F3	Mar 7, 2018	S	18,131	$5.1528	D	702,393	I	See footnote
Common Stock^F1,F2,F4	Mar 7, 2018	S	2,040	$5.1528	D	79,033	I	See footnote
Common Stock^F1,F2,F5	Mar 7, 2018	S	14,787	$5.1528	D	572,848	I	See footnote
Common Stock^F6,F2,F3	Mar 8, 2018	S	18,060	$5.1748	D	684,333	I	See footnote
Common Stock^F6,F2,F4	Mar 8, 2018	S	2,032	$5.1748	D	77,001	I	See footnote
Common Stock^F6,F5	Mar 8, 2018	S	14,729	$5.1748	D	558,119	I	See footnote
Common Stock^F7,F3	Mar 9, 2018	S	34,949	$5.5155	D	649,384	I	See footnote
Common Stock^F7,F4	Mar 9, 2018	S	3,932	$5.5155	D	73,069	I	See footnote
Common Stock^F7,F5	Mar 9, 2018	S	28,503	$5.5155	D	529,616	I	See footnote
Common Stock^F8,F3	Mar 9, 2018	S	17,463	$6.3657	D	631,921	I	See footnote
Common Stock^F8,F4	Mar 9, 2018	S	1,965	$6.3657	D	71,104	I	See footnote
Common Stock^F8,F5	Mar 9, 2018	S	14,242	$6.3657	D	515,374	I	See footnote

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.00 to $5.26, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (6), (7) and (8).
F2On March 9, 2018, the Reporting Persons filed a Form 4 that incorrectly stated in column 9 of Table II the number of shares of common stock beneficially owned following the reported transactions.
F3Shares held directly by Insight Venture Partners (Delaware) VIII, L.P.
F4Shares held directly by Insight Venture Partners VIII (Co-Investors), L.P.
F5Shares held directly by Insight Venture Partners (Cayman) VIII, L.P.
F6The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.00 to $5.40, inclusive.
F7The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.17 to $6.16, inclusive.
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.17 to $6.56, inclusive.

Exhibit List Exhibit 99.1 - Joint Filers' Signatures