XML 54 R18.htm IDEA: XBRL DOCUMENT v2.4.0.6
SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION
 12 Months Ended
Dec. 31, 2012
SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION [Abstract]  
SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION
9. SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION
 
In 2012, 2011 and 2010, one customer, who is in the automobile manufacturing industry, accounted for 17%, 26% and 34% 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 2012, 2011 and 2010, 37%, 38% and 40%, respectively, were derived from transportation services provided to the automobile manufacturing industry. Accounts receivable from the largest customer totaled approximately $10,947,000 and $13,506,000 at December 31, 2012 and 2011, respectively.