EXHIBIT 4

TRANSACTIONS DURING PAST 60 DAYS

The Reporting Persons engaged in the following transactions in shares of Common Stock of the Company during the past 60 days.  Such transactions involved the purchase of shares on the Nasdaq National Market System.

Date	Type	Price	Quantity
1/17/2008	Purchase	8.30	1700
1/17/2008	Purchase	8.31	300
1/17/2008	Purchase	8.32	200
1/17/2008	Purchase	8.33	800
1/17/2008	Purchase	8.34	900
1/17/2008	Purchase	8.35	100
1/18/2008	Purchase	8.23	100
1/18/2008	Purchase	8.24	700
1/18/2008	Purchase	8.27	200
1/18/2008	Purchase	8.29	800
1/18/2008	Purchase	8.30	1000
1/18/2008	Purchase	8.33	3200
1/18/2008	Purchase	8.35	2800
1/18/2008	Purchase	8.41	2000
1/22/2008	Purchase	8.00	800
1/22/2008	Purchase	8.03	300
1/22/2008	Purchase	8.10	1100
1/22/2008	Purchase	8.12	2300
1/22/2008	Purchase	8.15	1000
1/22/2008	Purchase	8.16	1000
1/23/2008	Purchase	8.06	1600
1/23/2008	Purchase	8.21	500
1/23/2008	Purchase	8.24	1100
1/23/2008	Purchase	8.25	1800
1/24/2008	Purchase	8.30	300
1/24/2008	Purchase	8.35	2400
1/24/2008	Purchase	8.41	700
1/24/2008	Purchase	8.47	400
1/24/2008	Purchase	8.48	200
1/24/2008	Purchase	8.49	500
1/24/2008	Purchase	8.51	200
1/24/2008	Purchase	8.52	200
1/24/2008	Purchase	8.53	100
1/24/2008	Purchase	8.55	500
1/24/2008	Purchase	8.63	174
1/24/2008	Purchase	8.64	300

Date	Type	Price	Quantity
1/24/2008	Purchase	8.69	1000
1/24/2008	Purchase	8.75	200
1/25/2008	Purchase	8.45	2492
1/25/2008	Purchase	8.46	1400
1/25/2008	Purchase	8.47	908
1/25/2008	Purchase	8.48	900
1/25/2008	Purchase	8.50	1000
1/25/2008	Purchase	8.56	100
1/25/2008	Purchase	8.60	100
1/25/2008	Purchase	8.62	200
1/25/2008	Purchase	8.73	200
1/30/2008	Purchase	8.75	1500
1/31/2008	Purchase	8.40	500
1/31/2008	Purchase	8.50	2500
1/31/2008	Purchase	8.55	3000
1/31/2008	Purchase	8.60	1500
1/31/2008	Purchase	8.65	500
1/31/2008	Purchase	8.69	500
1/31/2008	Purchase	8.70	1500
2/1/2008	Purchase	8.55	1000
2/1/2008	Purchase	8.60	1785
2/1/2008	Purchase	8.65	2500
2/1/2008	Purchase	8.66	100
2/1/2008	Purchase	8.67	5290
2/1/2008	Purchase	8.68	500
2/1/2008	Purchase	8.70	1000
2/5/2008	Purchase	9.16	1900
2/5/2008	Purchase	8.18	1400
2/5/2008	Purchase	9.19	100
2/5/2008	Purchase	8.20	840
2/5/2008	Purchase	9.23	100
2/5/2008	Purchase	9.25	2300
2/5/2008	Purchase	9.26	1400
2/5/2008	Purchase	9.31	1500
2/5/2008	Purchase	9.33	900
2/5/2008	Purchase	9.34	1000
2/5/2008	Purchase	9.35	200
2/5/2008	Purchase	9.37	1600
2/5/2008	Purchase	9.39	2500
2/5/2008	Purchase	9.40	900
2/5/2008	Purchase	9.41	100
2/5/2008	Purchase	9.42	2500
2/5/2008	Purchase	9.43	500
2/5/2008	Purchase	9.45	2200
2/5/2008	Purchase	9.48	900

Date	Type	Price	Quantity
2/5/2008	Purchase	9.50	3300
2/6/2008	Purchase	9.50	1000
2/7/2008	Purchase	9.25	300
2/7/2008	Purchase	9.27	5000
2/7/2008	Purchase	9.28	1000
2/7/2008	Purchase	9.29	1000
2/7/2008	Purchase	9.30	900
2/7/2008	Purchase	9.31	1100
2/7/2008	Purchase	9.32	200
2/7/2008	Purchase	9.33	1400
2/7/2008	Purchase	9.35	900
2/7/2008	Purchase	9.36	1300
2/7/2008	Purchase	9.40	1000
2/8/2008	Purchase	9.31	163
2/8/2008	Purchase	9.35	1000
2/8/2008	Purchase	9.39	200
2/8/2008	Purchase	9.40	700
2/8/2008	Purchase	9.50	200
2/11/2008	Purchase	9.25	1000
2/11/2008	Purchase	9.27	1400
2/11/2008	Purchase	9.28	1200
2/11/2008	Purchase	9.32	400
2/11/2008	Purchase	9.33	500
2/11/2008	Purchase	9.50	1000
2/12/2008	Purchase	9.14	200
2/12/2008	Purchase	9.17	100
2/12/2008	Purchase	9.19	700
2/12/2008	Purchase	9.20	200
2/12/2008	Purchase	9.24	500
2/12/2008	Purchase	9.25	5000
2/12/2008	Purchase	9.28	400
2/12/2008	Purchase	9.30	2500
2/12/2008	Purchase	9.31	500
2/12/2008	Purchase	9.35	1000
2/12/2008	Purchase	9.47	500
2/12/2008	Purchase	9.48	500