EX-2 3 ex2.htm EXHIBIT 2

EXHIBIT 2
 
JOINT FILING AGREEMENT

The undersigned hereby agree to the joint filing of the Amendment No. 1 to Schedule 13D to which this Agreement is attached.
 
Dated:  October 17, 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