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Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements
Dec. 31, 2013
Peterbilt [Member]
  
Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements [Line Items]  
Expiration Dates, by Distributor May 2014 through March 2016
International [Member]
  
Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements [Line Items]  
Expiration Dates, by Distributor May 2015 through September 2018
Isuzu [Member]
  
Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements [Line Items]  
Expiration Dates, by Distributor Indefinite
Hino [Member]
  
Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements [Line Items]  
Expiration Dates, by Distributor Indefinite
Ford [Member]
  
Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements [Line Items]  
Expiration Dates, by Distributor Indefinite
Blue Bird [Member]
  
Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements [Line Items]  
Expiration Dates, by Distributor August 2014
IC Bus [Member]
  
Note 3 - Supplier And Customer Concentration (Details) - Major Suppliers and Dealership Agreements [Line Items]  
Expiration Dates, by Distributor May 2015 through December 2017