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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