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Note 8 - Major Customers	3 Months Ended
Note 8 - Major Customers	Mar. 31, 2016
Notes to Financial Statements
Major Customers [Text Block]	8. MAJOR CUSTOMERS During the three months ended March 31, 2016, the Company’s three largest commercial customers accounted for 33%, 28% and 12% of revenue, respectively. During the three months ended March 31, 2015, the Company’s three largest commercial customers accounted for 21%, 19% and 15% of revenue, respectively. In addition, during the three months ended March 31, 2016 and 2015, 0.00% and 0.6%, respectively, of revenue was directly from the U.S. Government. At March 31, 2016, 28%, 27%, 14% and 10% of Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts were from the Company’s four largest commercial customers. At December 31, 2015, 26%, 23%, 13% and 11% of Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts were from the Company’s four largest commercial customers. At March 31, 2016 and December 31, 2015, 1.2% and 1.0%, respectively, of Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts were directly from the U.S. Government. At March 31, 2016, 25%, 22% and 16% of our accounts receivable were from our three largest commercial customers. At December 31, 2015, 30%, 18% and 16% of accounts receivable were from our three largest commercial customers.