Note 3 - Supplier And Customer Concentration (Detail) - Major Suppliers and Dealership Agreements	Dec. 31, 2012
Peterbilt [Member]
Expiration Dates, by Distributor	March 2013 through August 2015
International [Member]
Expiration Dates, by Distributor	May 2015 through May 2018
Isuzu [Member]
Expiration Dates, by Distributor	Indefinite
Hino [Member]
Expiration Dates, by Distributor	Indefinite
Ford [Member]
Expiration Dates, by Distributor	Indefinite
Blue Bird [Member]
Expiration Dates, by Distributor	August 2013
IC Bus [Member]
Expiration Dates, by Distributor	May 2015 through December 2017