Leases (Schedule of Lease Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2020
Leases [Abstract]
Lease costs under long-term operating leases	$ 7,079	$ 7,867	$ 7,605
Lease costs under short-term operating leases	71	32	426
Variable lease cost under short-term and long-term operating leases	282	434	325
Operating lease right-of-use asset impairment	0	3,057	1,189
Total operating lease cost	7,432	11,390	9,545
Cash paid for leases	8,571	8,406	8,101
Right-of-use assets recognized for new leases and amendments (non-cash)	$ 451	$ 3,222	$ 8,532
Weighted average remaining lease term in years	3 years 3 months 29 days	4 years 1 month 24 days
Weighted average discount rate	2.60%	2.60%