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v3.21.1

Summary of Significant Accounting Policies and Related Information - License agreements, trademarks, patents, and other intangible assets (Details) | 12 Months Ended
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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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