EXHIBIT 1

JOINT FILING AGREEMENT

The undersigned hereby agree to the joint filing of the Schedule 13G to which this Agreement is attached.

Dated:  February 15, 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