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Note 6 - Revenue, Deferred Revenue and Accounts Receivable - Summary of Changes in Deferred Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Deferred revenue balance $ 4,902 $ 11
Net additions to deferred revenue 33,641 18,826
Reductions in deferred revenue for revenue recognized during the fiscal year (37,418) (13,935)
Deferred revenue balance $ 1,125 $ 4,902