EXHIBIT A - ---------------------------------------------------------------------------- 1. 2. 3. TITLE OF TRANSACTION DATE TRANSACTION 4(i). 4(ii). SECURITY (MONTH/DAY/YEAR) CODE AMOUNT PRICE - ---------------------------------------------------------------------------- Common Stock 12/19/2006 P 1159 $2.55 - ---------------------------------------------------------------------------- Common Stock 12/20/2006 S 1159 $2.78 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 10000 $3.70 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 50000 $3.72 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 200 $3.72 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 19050 $3.72 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 5000 $3.72 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 10000 $3.74 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 5000 $3.75 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 72027 $3.75 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 450 $3.76 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 P 300 $3.76 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 S 100000 $3.75 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 S 5000 $3.67 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 S 5000 $3.67 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 S 200 $3.67 - ---------------------------------------------------------------------------- Common Stock 12/21/2006 S 61827 $3.67 - ---------------------------------------------------------------------------- Common Stock 12/22/2006 P 750 $3.70 - ---------------------------------------------------------------------------- Common Stock 12/26/2006 S 750 $3.56 - ---------------------------------------------------------------------------- Common Stock 12/27/2006 S 139 $3.91 - ---------------------------------------------------------------------------- Common Stock 12/28/2006 P 139 $3.78 - ---------------------------------------------------------------------------- Common Stock 1/3/2007 P 3000 $3.85 - ---------------------------------------------------------------------------- Common Stock 1/5/2007 S 170 $3.53 - ---------------------------------------------------------------------------- Common Stock 1/5/2007 S 2830 $3.53 - ---------------------------------------------------------------------------- Common Stock 1/12/2007 * P 284 $2.88 - ---------------------------------------------------------------------------- Common Stock 1/12/2007 * P 1000 $3.05 - ---------------------------------------------------------------------------- Common Stock 1/16/2007 * S 284 $3.07 - ---------------------------------------------------------------------------- Common Stock 1/16/2007 * S 1000 $2.97 - ---------------------------------------------------------------------------- Common Stock 1/31/2007 ** P 350 $2.79 - ---------------------------------------------------------------------------- Common Stock 2/2/2007 ** S 350 $2.65 - ---------------------------------------------------------------------------- Common Stock 2/22/2007 *** P 69 $2.66 - ---------------------------------------------------------------------------- Common Stock 2/22/2007 *** S 69 $2.65 - ---------------------------------------------------------------------------- Common Stock 4/2/2007 P 257 $2.93 - ---------------------------------------------------------------------------- Common Stock 4/2/2007 S 257 $2.84 - ---------------------------------------------------------------------------- Common Stock 5/10/2007 P 75 $2.03 - ---------------------------------------------------------------------------- Common Stock 5/10/2007 S 75 $1.98 - ---------------------------------------------------------------------------- Common Stock 5/14/2007 P 156 $2.35 - ---------------------------------------------------------------------------- Common Stock 5/14/2007 S 156 $2.31 - ---------------------------------------------------------------------------- Common Stock 5/16/2007 P 500 $2.09 - ---------------------------------------------------------------------------- Common Stock 5/17/2007 S 500 $1.98 - ---------------------------------------------------------------------------- Common Stock 5/21/2007 P 350 $2.20 - ---------------------------------------------------------------------------- Common Stock 5/21/2007 P 100 $2.20 - ---------------------------------------------------------------------------- Common Stock 5/21/2007 P 100 $2.22 - ---------------------------------------------------------------------------- Common Stock 5/21/2007 P 100 $2.23 - ---------------------------------------------------------------------------- Common Stock 5/21/2007 P 400 $2.24 - ---------------------------------------------------------------------------- Common Stock 5/21/2007 P 400 $2.24 - ---------------------------------------------------------------------------- Common Stock 5/22/2007 P 900 $2.17 - ---------------------------------------------------------------------------- Common Stock 5/22/2007 P 100 $2.17 - ---------------------------------------------------------------------------- Common Stock 5/22/2007 S 100 $2.16 - ---------------------------------------------------------------------------- Common Stock 5/22/2007 S 350 $2.16 - ---------------------------------------------------------------------------- Common Stock 5/23/2007 S 500 $2.18 - ---------------------------------------------------------------------------- Common Stock 5/23/2007 P 2000 $2.14 - ---------------------------------------------------------------------------- Common Stock 5/23/2007 S 500 $2.18 - ---------------------------------------------------------------------------- Common Stock 5/25/2007 S 500 $2.40 - ---------------------------------------------------------------------------- Common Stock 5/25/2007 S 1500 $2.40 - ---------------------------------------------------------------------------- Common Stock 5/31/2007 P 500 $2.69 - ---------------------------------------------------------------------------- Common Stock 5/31/2007 P 500 $2.70 - ---------------------------------------------------------------------------- Common Stock 5/31/2007 P 500 $2.73 - ---------------------------------------------------------------------------- Common Stock 5/31/2007 P 1000 $2.73 - ---------------------------------------------------------------------------- Common Stock 6/1/2007 S 500 $2.67 - ---------------------------------------------------------------------------- Common Stock 6/1/2007 S 500 $2.67 - ---------------------------------------------------------------------------- Common Stock 6/4/2007 S 1000 $2.77 - ---------------------------------------------------------------------------- Common Stock 6/4/2007 S 500 $2.77 - ---------------------------------------------------------------------------- Common Stock 6/11/2007 S 500 $2.68 - ---------------------------------------------------------------------------- Common Stock 6/11/2007 S 500 $2.68 - ---------------------------------------------------------------------------- Common Stock 6/22/2007 P 57 $2.67 - ---------------------------------------------------------------------------- Common Stock 6/22/2007 S 70 $2.67 - ---------------------------------------------------------------------------- Common Stock 6/25/2007 P 70 $2.72 - ---------------------------------------------------------------------------- Common Stock 6/28/2007 S 57 $2.43 - ---------------------------------------------------------------------------- Common Stock 7/23/2007 P 9500 $1.86 - ---------------------------------------------------------------------------- Common Stock 7/24/2007 P 506 $1.67 - ---------------------------------------------------------------------------- Common Stock 7/24/2007 P 500 $1.67 - ---------------------------------------------------------------------------- Common Stock 7/24/2007 S 506 $1.70 - ---------------------------------------------------------------------------- Common Stock 7/24/2007 S 500 $1.70 - ---------------------------------------------------------------------------- Common Stock 7/24/2007 S 500 $1.70 - ---------------------------------------------------------------------------- Common Stock 7/24/2007 S 9000 $1.67 - ---------------------------------------------------------------------------- Common Stock 7/26/2007 S 20000 $1.18 - ---------------------------------------------------------------------------- Common Stock 7/26/2007 P 20000 $1.25 - ---------------------------------------------------------------------------- Common Stock 8/2/2007 P 1000 $1.19 - ---------------------------------------------------------------------------- Common Stock 8/3/2007 S 500 $1.19 - ---------------------------------------------------------------------------- Common Stock 8/3/2007 S 500 $1.19 - ---------------------------------------------------------------------------- * These transactions were previously reported on a Form 4 filed by the Reporting Persons on January 30, 2007. ** These transactions were previously reported on a Form 4 filed by the Reporting Persons on February 12, 2007. *** These transactions were previously reported on a Form 4 filed by the Reporting Persons on March 12, 2007.