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Note 9 - Significant Customers and Industry Concentration | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Concentration Risk Disclosure [Text Block] |
9. | SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION
In 201 7 and 2016 two customers, who are in the automobile manufacturing industry, accounted for 28% of revenues each year and in 2015, three customers, who are in the automobile manufacturing industry, accounted for 37% of revenues. 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 2017, 2016 and 2015, 46%, 45% and 47%, respectively, were derived from transportation services provided to the automobile manufacturing industry. Accounts receivable from the three largest customers totaled approximately $29,788,000 and $27,085,000 at December 31, 2017 and 2016, respectively.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -URI http://asc.fasb.org/topic&trid=2134479 + Details
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