Note 12 - Acquisition of AAT Carriers, Inc. - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Feb. 09, 2022	Dec. 31, 2021
Goodwill	$ 72,006		$ 42,518
AAT Carriers Inc [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 1,796
Accounts receivable		842
Prepaid expenses		33
Other short-term assets		69
Net property and equipment		7,994
Total identifiable assets acquired		10,734
Accounts payable		(19)
Accrued expenses		(946)
Finance lease obligations		(458)
Other long-term liabilities		(3)
Total liabilities assumed		(1,426)
Net identifiable assets acquired		9,308
Goodwill		29,488
Net assets acquired		$ 38,796