Equity

6 Months Ended

Jun. 30, 2011

Equity [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Note 5 – Equity Transactions

New York Stock Exchange Listing of Common Stock

On March 15, 2011, we completed the transfer of the primary listing for our common stock from the NYSE Amex to the New York Stock Exchange under the symbol “END.”

Common Stock Offering

On March 30, 2011, we completed an underwritten public offering of 11.5 million shares of common stock at a price of $11.00 per common share ($10.34 per common share, net of underwriting discounts) for net proceeds of $118.4 million. On April 20, 2011, we used a portion of the offering proceeds to redeem all $81.25 million of our outstanding 6% Senior Notes. We intend to use the remaining offering proceeds for general corporate purposes.

Series C Convertible Preferred Stock

On April 12, 2011, a holder of a portion of our Series C Convertible Preferred Stock converted 4,000 preferred shares into 457,142 shares of our common stock.