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Note 3 - Revenue Recognition - Remaining Performance Obligations 2 (Details)
Nov. 30, 2021
USD ($)
Revenue, remaining performance obligation, amount $ 148,971
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-12-01  
Revenue, remaining performance obligation, amount 38,116
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-12-01  
Revenue, remaining performance obligation, amount 19,256
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-12-01  
Revenue, remaining performance obligation, amount 17,125
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-12-01  
Revenue, remaining performance obligation, amount 16,958
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-12-01  
Revenue, remaining performance obligation, amount 12,908
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-12-01  
Revenue, remaining performance obligation, amount $ 44,608