Note 9 - Significant Customers and Industry Concentration

12 Months Ended

Dec. 31, 2017

Concentration Risk Disclosure [Text Block]

9.	SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION

201

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

December 31, 2017

and

2016,

respectively.