Significant Customers	12 Months Ended
Dec. 31, 2011
Significant Customers	Note 14 - Significant Customers As of December 31, 2011, Customers A and B represented 36% and 15% of accounts receivable, respectively. As of December 31, 2010, Customers A and C represented 22% and 35% of accounts receivable, respectively. As of December 31, 2011, Customers A, D, E and F represented 16%, 16%, 15% and 11% of costs and estimated earnings in excess of billings. As of December 31, 2010, Customers C and G represented 19% and 14% of accounts receivable, respectively. For the year ended December 31, 2011, no individual customer represented 10% or more of total sales. For the year ended December 31, 2010, Customers A, C and H represented 10%, 13% and 12% of total sales.

Note 14 - Significant Customers

As of December 31, 2011, Customers A and B represented 36% and 15% of accounts receivable, respectively. As of December 31, 2010, Customers A and C represented 22% and 35% of accounts receivable, respectively.

As of December 31, 2011, Customers A, D, E and F represented 16%, 16%, 15% and 11% of costs and estimated earnings in excess of billings. As of December 31, 2010, Customers C and G represented 19% and 14% of accounts receivable, respectively.

For the year ended December 31, 2011, no individual customer represented 10% or more of total sales. For the year ended December 31, 2010, Customers A, C and H represented 10%, 13% and 12% of total sales.