Operating Leases (Details) $ in Thousands		12 Months Ended
	Oct. 01, 2016 ft²	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($)
Operating leases of lessee, future minimum rental payments
Rental expense		$ 156	$ 194	$ 201
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	$ 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
2018		29,532
2019		25,983
2020		24,007
2021		17,849
2022		13,599
Later years		28,794
Total		139,764
Corporate headquarters
Operating leases of lessee, future minimum rental payments
2018		126
2019		125
2020		121
2021		122
2022		131
Later years		511
Total minimum lease payments		$ 1,136