Note 4 - Accounts Receivable (Detail) - Accounts Receivable (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Warranty claims	$ 8,762	$ 7,079
Other accounts receivable	22,104	15,243
Less allowance for bad debt and warranty receivable	(984)	(960)
Total	89,615	98,160
Trade Accounts Receivable From Sale of Vehicles [Member]
Trade receivables	40,840	58,741
Trade Receivable Other Than Vehicles [Member]
Trade receivables	$ 18,893	$ 18,057