Signature Pages

	BECKER DRAPKIN MANAGEMENT, L.P.
	By:	BC Advisors, LLC, its general partner
Date:  12/19/2011		By:	/s/ Andrew S. McLelland
			Name: Andrew S. McLelland
			Title: Attorney-in-Fact
	BECKER DRAPKIN PARTNERS (QP), L.P.
	By:	Becker Drapkin Management, L.P., its general partner
		By:	BC Advisors, LLC, its general partner
Date:  12/19/2011			By:	/s/ Andrew S. McLelland
				Name: Andrew S. McLelland
				Title: Attorney-in-Fact
	BECKER DRAPKIN PARTNERS, L.P.
	By:	Becker Drapkin Management, L.P., its general partner
		By:	BC Advisors, LLC, its general partner
Date:  12/19/2011			By:	/s/ Andrew S. McLelland
				Name: Andrew S. McLelland
				Title: Attorney-in-Fact
	BD PARTNERS IV, L.P.
	By:	Becker Drapkin Management, L.P., its general partner
		By:	BC Advisors, LLC, its general partner
Date:  12/19/2011			By:	/s/ Andrew S. McLelland
				Name: Andrew S. McLelland
				Title: Attorney-in-Fact
	BC ADVISORS, LLC
Date:  12/19/2011	By:	/s/ Andrew S. McLelland
		Name: Andrew S. McLelland
		Title: Attorney-in-Fact
	STEVEN R. BECKER
Date:  12/19/2011	By:	/s/ Andrew S. McLelland
		Name: Andrew S. McLelland
		Title: Attorney-in-Fact
	MATTHEW A. DRAPKIN
Date:  12/19/2011	By:	/s/ Andrew S. McLelland
		Name: Andrew S. McLelland
		Title: Attorney-in-Fact