EXHIBIT 1

 

JOINT FILING AGREEMENT

 

The undersigned hereby agree to the joint filing of the Amendment No. 1 to the Schedule 13G to which this Agreement is attached.

 

Dated: January 28, 2005

 

 

DISCOVERY GROUP I, LLC

 

 

 

 

 

 

 

By

/s/ Michael R. Murphy

 

 

 

Michael R. Murphy

 

 

Managing Member

 

 

 

 

 

/s/ Daniel J. Donoghue

 

 

Daniel J. Donoghue

 

 

 

 

 

/s/ Michael R. Murphy

 

 

Michael R. Murphy

 

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