For the year ended December 31, 2011, the Company
had contract revenues from four customers representing approximately 67.1% of total contract revenues, compared to contract revenues
from two customers representing approximately 43.5% of total contract revenues for the same period in 2010. At December 31, 2011
and 2010, these customers accounted for $4,789,187 and $2,713,970 in sales, respectively and accounted for more than 50% of accounts
receivable at those dates.