JOINT FILING AGREEMENT
The undersigned hereby agree to the joint filing of Amendment No. 10 to the Schedule 13D to which this Agreement is attached.
Dated: November 2, 2010
DISCOVERY GROUP I, LLC | |
for itself and as general partner of | |
DISCOVERY EQUITY PARTNERS, L.P. | |
By Michael R. Murphy* | |
Michael R. Murphy | |
Managing Member | |
Daniel J. Donoghue* | |
Daniel J. Donoghue | |
Michael R. Murphy* | |
Michael R. Murphy | |
*By: /s/ Mark Buckley | |
Mark Buckley | |
Attorney-in-Fact for Daniel J. Donoghue | |
Attorney-in-Fact for Michael R. Murphy |