In Oct. and Nov. 2009 we had some high volume days (100k+ shares traded), we now know who was selling (not really a suprise I guess):
"Item 2. Unregistered Sales of Equity Securities and Use of Proceeds"
"In October 2009, the Company issued 462,500 shares of its common stock to certain holders of its 2008 Notes in connection with the conversion of $3,700,000 aggregate principal amount of such Notes pursuant to the terms thereof by such holders."
"In November 2009, the Company issued 62,500 shares of its common stock to certain holder of its 2007 Notes in connection with the conversion of $500,000 aggregate principal amount of such Notes pursuant to the terms thereof by such holders."