JOINT FILING AGREEMENT
EXHIBIT 1
The undersigned hereby agree to the joint filing of the Amendment No. 4 to Schedule 13D to which this Agreement is attached.
Dated: December 13, 2013
| DISCOVERY GROUP I, LLC | ||
| for itself and as general partner of | ||
| DISCOVERY EQUITY PARTNERS, L.P. | ||
| By | Xxxxxxx X. Xxxxxx* | |
| Xxxxxxx X. Xxxxxx | ||
| Managing Member | ||
| Xxxxxx X. Xxxxxxxx* | ||
| Xxxxxx X. Xxxxxxxx | ||
| Xxxxxxx X. Xxxxxx* | ||
| Xxxxxxx X. Xxxxxx | ||
| *By: | /s/ Xxxx Xxxxxxx | |
| Xxxx Xxxxxxx | ||
| Attorney-in-Fact for Xxxxxx X. Xxxxxxxx | ||
| Attorney-in-Fact for Xxxxxxx X. Xxxxxx | ||
