EXHIBIT 1
TRANSACTIONS DURING PAST 60 DAYS
The Reporting Persons engaged in the following transactions in shares of Common Stock of the Company during the past 60 days. Such transactions involved the sale of shares on the New York Stock Exchange. The prices reported below reflect the weighted average sale price of the shares of Common Stock sold on the relevant date. The Reporting Persons hereby undertake to provide upon request to the SEC staff full information regarding the number of shares and prices at which each transaction was effected.
| Date | Type | Price | Shares | ||||
| 11/20/2017 | Sale | $ 5.6005 | 1 | 26000 | |||
| 11/21/2017 | Sale | $ 5.3473 | 2 | 27000 | |||
| 11/22/2017 | Sale | $ 5.2561 | 3 | 18320 | |||
| 11/24/2017 | Sale | $ 5.2550 | 4 | 25771 | |||
| 11/27/2017 | Sale | $ 5.3241 | 5 | 28500 | |||
| 11/28/2017 | Sale | $ 5.5307 | 6 | 28200 | |||
| 11/29/2017 | Sale | $ 5.5687 | 7 | 26800 | |||
| 11/30/2017 | Sale | $ 5.7593 | 8 | 27000 | |||
| 12/1/2017 | Sale | $ 5.6231 | 9 | 25800 | |||
| 12/4/2017 | Sale | $ 5.7561 | 10 | 45000 | |||
| 12/5/2017 | Sale | $ 6.1922 | 11 | 43000 | |||
| 12/6/2017 | Sale | $ 6.2956 | 12 | 39600 | |||
| 12/7/2017 | Sale | $ 6.3841 | 13 | 39000 | |||
| 12/8/2017 | Sale | $ 6.4205 | 14 | 39000 | |||
| 12/11/2017 | Sale | $ 6.4832 | 15 | 77000 | |||
| 12/12/2017 | Sale | $ 6.4784 | 16 | 77000 | |||
| 12/13/2017 | Sale | $ 7.0027 | 17 | 77000 | |||
| 12/14/2017 | Sale | $ 7.1590 | 18 | 71800 | |||
| 12/15/2017 | Sale | $ 7.0809 | 19 | 71000 | |||
| 12/18/2017 | Sale | $ 11.9364 | 20 | 2606004 | |||
| 12/18/2017 | Sale | $ 11.9469 | 21 | 1500000 |
1This transaction was executed in multiple trades at prices ranging from $5.53 – 5.68.
2This transaction was executed in multiple trades at prices ranging from $5.25 – 5.53.
3This transaction was executed in multiple trades at prices ranging from $5.21 – 5.335.
4This transaction was executed in multiple trades at prices ranging from $5.18 – 5.39.
5This transaction was executed in multiple trades at prices ranging from $5.27 – 5.38.
6This transaction was executed in multiple trades at prices ranging from $5.33 – 5.66.
7This transaction was executed in multiple trades at prices ranging from $5.47 – 5.68.
8This transaction was executed in multiple trades at prices ranging from $5.60 – 5.93.
9This transaction was executed in multiple trades at prices ranging from $5.50 – 5.80.
10This transaction was executed in multiple trades at prices ranging from $5.67 – 5.805.
11This transaction was executed in multiple trades at prices ranging from $5.74 – 6.40.
12This transaction was executed in multiple trades at prices ranging from $6.08 – 6.43.
13This transaction was executed in multiple trades at prices ranging from $6.24 – 6.51.
14This transaction was executed in multiple trades at prices ranging from $6.21 – 6.52.
15This transaction was executed in multiple trades at prices ranging from $6.37 – 6.56.
16This transaction was executed in multiple trades at prices ranging from $6.36 – 6.62.
17This transaction was executed in multiple trades at prices ranging from $6.51 – 7.18.
18This transaction was executed in multiple trades at prices ranging from $6.845 – 7.46.
19This transaction was executed in multiple trades at prices ranging from $6.95 – 7.325.
20This transaction was executed in multiple trades at prices ranging from $11.93 – 11.95.
21This transaction was executed in multiple trades at prices ranging from $11.94 – 12.00.
