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Note 11 - Major Customers	12 Months Ended
	Dec. 31, 2015
Notes to Financial Statements
Major Customers [Text Block]	11.     MAJOR CUSTOMERS: One percent of revenue in 2015, 2% of revenue in 2014 and 2% of revenue in 2013 were directly to the U.S. government.   Less than 1% and 1% of accounts receivable at December 31, 2015 and 2014, respectively, were from the U. S. Government. In addition, in 2015, 30%, 17%, 13% and 12% of our revenue were to our four largest commercial customers, respectively. In 2014, 22%, 22%, 19% and 11% of our revenue were to our four largest commercial customers, respectively. At December 31, 2015, 30%, 18% and 16% of accounts receivable were from our three largest commercial customers. At December 31, 2014, 26%, 21% and 15% of accounts receivable were from our three largest commercial customers. At December 31, 2015 and 2014, 1% of costs and estimated earnings in excess of billings on uncompleted contracts were from the U.S. Government. At December 31, 2015, 26%, 23%, 13%, and 11% of costs and estimated earnings in excess of billings on uncompleted contracts were from our four largest commercial customers. At December 31, 2014, 27%, 25%, 13% and 8% of costs and estimated earnings in excess of billings on uncompleted contracts were from our four largest commercial customers.

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- Definition

The entire disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues.

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