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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 13 Months Ended
Nov. 30, 2021
Dec. 31, 2022
Nov. 30, 2022
Deferred revenue balance $ 4,902 $ 1,125  
Net additions to deferred revenue 33,641 30,817  
Reductions in deferred revenue for revenue recognized during the fiscal year (37,418) (31,144)  
Deferred revenue balance 1,125 798  
Less current portion 720 458 $ 458
Deferred revenue, non-current $ 405 $ 340 $ 340