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Summary of Significant Accounting Policies and Related Information - License agreements, trademarks, patents, and other intangible assets (Details)	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Patents | Maximum
Foreign Currency Risk and Currency Exchange Uncertainties
Weighted Average Life (in years)	14 years
Patents | Minimum
Foreign Currency Risk and Currency Exchange Uncertainties
Weighted Average Life (in years)	12 years
Net sales revenue | Net sales revenue subject to trademark license agreements
Foreign Currency Risk and Currency Exchange Uncertainties
Concentration risk percentage	41.00%	43.00%	41.00%
Net sales revenue | Net sales revenue subject to trademark license agreements | Licensor One
Foreign Currency Risk and Currency Exchange Uncertainties
Concentration risk percentage	15.00%
Net sales revenue | Net sales revenue subject to trademark license agreements | Licensor Two
Foreign Currency Risk and Currency Exchange Uncertainties
Concentration risk percentage	12.00%

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