Note 6 - Acquisition of AAT Carriers, Inc. - Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Balance	$ 0
Additions	(16,210)
Adjustment to fair market value	(813)
Balance	(17,023)
AAT Carriers Inc [Member]
Balance	0
Additions	(16,210)
Adjustment to fair market value	(813)
Balance	$ (17,023)