Note 12 - Discontinued Operations - Discontinued Operations (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Feb. 28, 2022	Aug. 27, 2022	Aug. 28, 2021	Aug. 27, 2022	Aug. 28, 2021	Nov. 27, 2021
Major line items constituting pretax income of discontinued operations:
Proceeds from the disposal of discontinued operations, net				$ 84,534	$ 0
Current assets of discontinued operations held for sale		$ 0		0		$ 11,064
Long-term assets of discontinued operations held for sale		0		0		52,757
Gain on disposal (less adjustments)		(193)	$ 0	53,061	0
Current liabilities of discontinued operations held for sale		0		0		16,095
Long-term liabilities of discontinued operations held for sale		0		0		16,210
Zenith Freight Lines [Member] | Discontinued Operations, Disposed of by Sale [Member]
Sales price prior to post-closing working capital adjustment	$ 86,939
Major line items constituting pretax income of discontinued operations:
Cash provided by operating activities				1,681	3,231
Accounts receivable, net						7,601
Logistical services revenue		0	14,036	16,776	40,116
Amount held in escrow for contingencies related to representations and warranties (1)	1,000
Other current assets						3,463
Proceeds from the disposal of discontinued operations, net	84,534			(81)	(2,706)
Seller expenses paid at closing	418
Property and equipment, net						24,898
Working capital adjustment paid to buyer	$ 987
Goodwill and other intangible assets						9,094
Cash used in financing activities				(371)	(834)
Right of use assets under operating leases						18,193
Cost of logistical services		0	14,522	15,001	38,849
Other						572
Net cash provided by (used in) discontinued operations				1,229	(309)
Disposal Group, Including Discontinued Operation, Assets, Total						63,821
Current assets of discontinued operations held for sale						11,064
Other loss, net		0	(79)	(63)	(188)
Long-term assets of discontinued operations held for sale						52,757
Accounts payable						4,336
Income (loss) from operations of logistical services		0	(565)	1,712	1,079
Accrued compensation and benefits						3,295
Current portion operating lease obligations						7,458
Other current liabilites and accrued expenses						1,006
Long-term portion of operating lease obligations						10,996
Gain on disposal (less adjustments)		(193)	0	53,061	0
Other long-term liabilities						5,214
Disposal Group, Including Discontinued Operation, Liabilities, Total						32,305
Current liabilities of discontinued operations held for sale						16,095
Pretax income of discontinued operations		(193)	(565)	54,773	1,079
Long-term liabilities of discontinued operations held for sale						$ 16,210
Income tax expense (benefit)		(48)	(140)	14,261	294
Income (loss) from discontinued operations, net of tax		$ (145)	$ (425)	$ 40,512	$ 785