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Note 9 - Significant Customers and Industry Concentration	12 Months Ended
Dec. 31, 2013
Risks and Uncertainties [Abstract]
Concentration Risk Disclosure [Text Block]	9. SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION In 2013, 2012 and 2011, two customers, who are in the automobile manufacturing industry, accounted for 33%, 28% and 31% 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 2013, 2012 and 2011, 46%, 37% and 38%, respectively, were derived from transportation services provided to the automobile manufacturing industry. Accounts receivable from the two largest customers totaled approximately $28,290,000 and $16,158,000 at December 31, 2013 and 2012, respectively.

Note 9 - Significant Customers and Industry Concentration

12 Months Ended

Dec. 31, 2013

Concentration Risk Disclosure [Text Block]

9. SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION

In 2013, 2012 and 2011, two customers, who are in the automobile manufacturing industry, accounted for 33%, 28% and 31% 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 2013, 2012 and 2011, 46%, 37% and 38%, respectively, were derived from transportation services provided to the automobile manufacturing industry. Accounts receivable from the two largest customers totaled approximately $28,290,000 and $16,158,000 at December 31, 2013 and 2012, respectively.

- 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.

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