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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

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