| 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 purchase of shares on the NASDAQ Global Select Market. Certain of the prices reported below reflect the weighted average purchase price of the shares of Common Stock purchased 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 | |||
| 4/27/2015 | Purchase | $ | 10.5536 | 1 | 64082 | |
| 4/28/2015 | Purchase | $ | 10.4237 | 2 | 64832 | |
| 4/29/2015 | Purchase | $ | 9.3445 | 3 | 104321 | |
| 4/30/2015 | Purchase | $ | 9.3763 | 4 | 26546 | |
| 5/1/2015 | Purchase | $ | 9.3651 | 5 | 45189 | |
| 5/4/2015 | Purchase | $ | 9.4135 | 6 | 31615 | |
| 5/5/2015 | Purchase | $ | 9.3791 | 7 | 20879 | |
| 5/6/2015 | Purchase | $ | 9.4064 | 8 | 24864 | |
| 5/7/2015 | Purchase | $ | 9.4454 | 9 | 26675 | |
| 5/8/2015 | Purchase | $ | 9.5536 | 10 | 37863 | |
| 5/11/2015 | Purchase | $ | 9.5278 | 11 | 26500 | |
| 5/12/2015 | Purchase | $ | 9.4216 | 12 | 70550 | |
| 5/13/2015 | Purchase | $ | 9.4911 | 13 | 24576 | |
| 5/14/2015 | Purchase | $ | 9.6169 | 14 | 38478 | |
| 5/15/2015 | Purchase | $ | 9.7755 | 15 | 17800 | |
| 5/18/2015 | Purchase | $ | 9.9264 | 16 | 25584 | |
| 5/19/2015 | Purchase | $ | 9.8548 | 17 | 15890 | |
| 5/20/2015 | Purchase | $ | 9.8019 | 18 | 26613 | |
| 5/21/2015 | Purchase | $ | 9.8043 | 19 | 21600 | |
| 5/22/2015 | Purchase | $ | 9.7921 | 20 | 19054 | |
1This transaction was executed in multiple trades at prices ranging from $10.37 - 10.75.
2This transaction was executed in multiple trades at prices ranging from $10.31 – 10.48.
3This transaction was executed in multiple trades at prices ranging from $8.98 – 9.42.
4This transaction was executed in multiple trades at prices ranging from $9.28 – 9.40.
5This transaction was executed in multiple trades at prices ranging from $9.30 – 9.45.
6This transaction was executed in multiple trades at prices ranging from $9.34 – 9.52.
7This transaction was executed in multiple trades at prices ranging from $9.30 – 9.42.
8This transaction was executed in multiple trades at prices ranging from $9.40 – 9.43.
9This transaction was executed in multiple trades at prices ranging from $9.40 – 9.50.
10This transaction was executed in multiple trades at prices ranging from $9.47 – 9.59.
11This transaction was executed in multiple trades at prices ranging from $9.46 – 9.60.
12This transaction was executed in multiple trades at prices ranging from $9.33 – 9.50.
13This transaction was executed in multiple trades at prices ranging from $9.45 – 9.50.
14This transaction was executed in multiple trades at prices ranging from $9.60 – 9.75.
15This transaction was executed in multiple trades at prices ranging from $9.70 – 9.81.
16This transaction was executed in multiple trades at prices ranging from $9.78 – 10.00.
17This transaction was executed in multiple trades at prices ranging from $9.80 – 9.92.
18This transaction was executed in multiple trades at prices ranging from $9.77 – 9.84.
19This transaction was executed in multiple trades at prices ranging from $9.74 – 9.87.
20This transaction was executed in multiple trades at prices ranging from $9.73 – 9.86.
| 5/26/2015 | Purchase | $ | 9.5469 | 21 | 15606 | |
| 5/27/2015 | Purchase | $ | 9.5500 | 25280 | ||
| 5/28/2015 | Purchase | $ | 9.6376 | 22 | 35200 | |
| 5/29/2015 | Purchase | $ | 9.6805 | 23 | 31900 | |
| 6/1/2015 | Purchase | $ | 9.6922 | 24 | 14307 | |
| 6/2/2015 | Purchase | $ | 9.5683 | 25 | 14200 | |
| 6/3/2015 | Purchase | $ | 9.5746 | 26 | 31508 | |
| 6/4/2015 | Purchase | $ | 9.6299 | 27 | 26172 | |
| 6/5/2015 | Purchase | $ | 9.0266 | 28 | 125000 | |
| 6/8/2015 | Purchase | $ | 9.2923 | 29 | 51065 | |
| 6/9/2015 | Purchase | $ | 9.0116 | 30 | 56403 | |
| 6/10/2015 | Purchase | $ | 8.9151 | 31 | 49191 | |
| 6/11/2015 | Purchase | $ | 9.1586 | 32 | 14034 | |
| 6/12/2015 | Purchase | $ | 9.1466 | 33 | 27726 | |
| 6/15/2015 | Purchase | $ | 8.9928 | 34 | 25772 | |
| 6/16/2015 | Purchase | $ | 9.0088 | 35 | 20785 | |
| 6/17/2015 | Purchase | $ | 9.0107 | 36 | 23500 | |
| 6/18/2015 | Purchase | $ | 9.0797 | 37 | 22400 | |
| 6/19/2015 | Purchase | $ | 9.2861 | 38 | 50000 | |
| 6/22/2015 | Purchase | $ | 9.3514 | 39 | 17000 | |
| 6/23/2015 | Purchase | $ | 9.3379 | 40 | 14000 |
21This transaction was executed in multiple trades at prices ranging from $9.53 – 9.57.
22This transaction was executed in multiple trades at prices ranging from $9.59 – 9.69.
23This transaction was executed in multiple trades at prices ranging from $9.52 – 9.73.
24This transaction was executed in multiple trades at prices ranging from $9.60 – 9.70.
25This transaction was executed in multiple trades at prices ranging from $9.40 – 9.69.
26This transaction was executed in multiple trades at prices ranging from $9.43 – 9.60.
27This transaction was executed in multiple trades at prices ranging from $9.54 – 9.65.
28This transaction was executed in multiple trades at prices ranging from $8.7350 – 9.33.
29This transaction was executed in multiple trades at prices ranging from $9.24 – 9.31.
30This transaction was executed in multiple trades at prices ranging from $8.92 – 9.20.
31This transaction was executed in multiple trades at prices ranging from $8.88 – 8.95.
32This transaction was executed in multiple trades at prices ranging from $8.95 – 9.20.
33This transaction was executed in multiple trades at prices ranging from $9.05 – 9.21.
34This transaction was executed in multiple trades at prices ranging from $8.93 – 9.05.
35This transaction was executed in multiple trades at prices ranging from $8.93 – 9.06.
36This transaction was executed in multiple trades at prices ranging from $8.95 – 9.10.
37This transaction was executed in multiple trades at prices ranging from $9.035 – 9.105.
38This transaction was executed in multiple trades at prices ranging from $9.15 – 9.3499.
39This transaction was executed in multiple trades at prices ranging from $9.33 – 9.39.
40This transaction was executed in multiple trades at prices ranging from $9.33 – 9.35.
