EX-2 3 ex2.htm EXHIBIT 2

EXHIBIT 2

JOINT FILING AGREEMENT
 
The undersigned hereby agree to the joint filing of the Amendment No. 8 to Schedule 13D to which this Agreement is attached.
 
Dated: March 19, 2014
     
 
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