Note 4 - Accounts Receivable - Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Warranty claims	$ 9,290	$ 9,032
Other accounts receivable	26,003	24,027
Less allowance for credit losses	(1,590)	(1,605)
Total	140,186	172,481
Trade Accounts Receivable From Sale of Vehicles [Member]
Trade receivables	37,599	82,338
Trade Receivable Other Than Vehicles [Member]
Trade receivables	$ 68,884	$ 58,689