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If the Company received emission credits under applicable laws and failed to sell to the investor the credits up to the full amount of emission credits covered by the option, the investor was entitled to liquidated damages equal to 30% of the aggregate market value of the shortfall in emission credits (subject to a limit on the market price of emission credits).&#160;&#160;Under the terms of the agreement, if the Company did not become entitled under applicable laws to the full amount of emission credits covered by the option by December&#160;31, 2012, the Company was obligated to return the option fee of $600,000, less the aggregate discount on any emission credits sold to the investor prior to such date. In December 2012, the Company and the investor agreed to extend the period for the sale of emission credits until December 31, 2017. As of January 31, 2013, the Company has not generated any emissions credits eligible for purchase under the agreement and the Company does not believe it is probable that it will generate any eligible emissions credits before December 31, 2017. 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Compensation cost for the portion of the awards for which the requisite service had not been rendered that were outstanding as of May&#160;1, 2006 is being recognized in the consolidated statements of operations over the remaining service period after such date based on the award's original estimated fair value. 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