Note 9 - Significant Customers and Industry Concentration

12 Months Ended

Dec. 31, 2015

Concentration Risk Disclosure [Text Block]

9.	SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION

In 2015, three customers, who are in the automobile manufacturing industry, accounted for 37% of revenues. In 2014 and 2013, two customers, who are in the automobile manufacturing industry, accounted for 34% and 33% of revenues, respectively. The Company also provides transportation services to other manufacturers who are suppliers for automobile manufacturers including suppliers for the Company’s largest customer. As a result, concentration of the Company’s business within the automobile industry is significant. Of the Company’s revenues for 2015, 2014 and 2013, 47%, 48% and 46%, respectively, were derived from transportation services provided to the automobile manufacturing industry. Accounts receivable from the three largest customers totaled approximately $27,051,000 and $28,297,000 at December 31, 2015 and 2014, respectively.