Note 13 - Significant Customers

12 Months Ended

Dec. 31, 2016

Notes

Note 13 - Significant Customers

Note 13 - Significant Customers

As of December 31, 2016, Customers A and G represented 19% and 29% of accounts receivable, respectively, and Customers D and F represented 48% and 18% of costs and estimated earnings in excess of billings, respectively.

As of December 31, 2015, Customers A, B, C and D represented 14%, 14%, 13% and 13% of accounts receivable, respectively, and Customers E and F represented 41% and 12% of costs and estimated earnings in excess of billings, respectively.

For the year ended December 31, 2016, Customer D represented 23% of total sales.  For the year ended December 31, 2015, no individual customer represented 10% or more of total sales.