Note 3 - Revenue Recognition - Remaining Performance Obligations 2 (Details)	May 31, 2023 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 194,468
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-06-01
Revenue, Remaining Performance Obligation, Amount	$ 28,709	[1]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-12-01
Revenue, Remaining Performance Obligation, Amount	$ 34,782
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-12-01
Revenue, Remaining Performance Obligation, Amount	$ 27,133
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-12-01
Revenue, Remaining Performance Obligation, Amount	$ 17,126
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-12-01
Revenue, Remaining Performance Obligation, Amount	$ 15,426
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-12-01
Revenue, Remaining Performance Obligation, Amount	$ 71,291
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year

[1] represents the estimate for the remainder of 2023