Operating Leases (Details) $ in Thousands		12 Months Ended
	Oct. 01, 2016 ft²	Nov. 30, 2018 USD ($)	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)
Operating leases of lessee, future minimum rental payments
Rental expense		$ 149	$ 156	$ 194
Cullman And Ernst Group [Member]
Operating leases of lessee, future minimum rental payments
Term of sublease	10 years
Area of subleased property | ft²	1,920
Cullman And Ernst Group [Member] | General and Administrative Expense
Operating leases of lessee, future minimum rental payments
Rental expense		124	$ 124	$ 10
Leasing of industrial, flex and office space and the lease of the farm in Florida
Operating leases of lessor, future minimum rentals to be received
2019		31,641
2020		30,448
2021		23,656
2022		16,542
2023		13,207
Later years		35,273
Total		150,767
Corporate headquarters
Operating leases of lessee, future minimum rental payments
2019		128
2020		124
2021		124
2022		124
2023		124
Later years		361
Total minimum lease payments		$ 985