Exhibit 4

Following is a schedule of sales of the Issuer’s Class A Common Stock by the Reporting Persons that have not previously been reported in this Schedule 13D or Amendment Nos. 1, 2, or 3 thereto. All of these sales were open market transactions on the NASDAQ Global Market except for the 100,000 share sale on 2/17/11, which was a privately negotiated transaction.

Date of Sale	Number of Shares Sold		Share Price
2/10/2011		30,505	$	2.8005
2/15/2011		17,200	$	2.7004
2/16/2011		18,500	$	2.7183
2/16/2011		7,000	$	2.8000
2/17/2011		37,823	$	2.7165
2/17/2011		100,000	$	2.7300
2/18/2011		8,200	$	2.7266