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Income taxes - Operating loss carryforwards (Details) - USD ($) $ in Thousands | Feb. 28, 2021 | Feb. 29, 2020
--- | --- | ---
Deferred Tax Assets |  |
Subtotal | $ 14,785 | $ 13,908
Less portion of valuation allowance established for operating loss carryforwards | (14,257) |
Total | 528 |
Operating Loss Carryforward |  |
Subtotal | 58,003 |
State |  |
Deferred Tax Assets |  |
Operating loss carryforwards with definite carryover periods | 334 |
Operating Loss Carryforward |  |
Required future taxable income - operating loss carryforwards with definite carryover periods | 4,550 |
Non-U.S. |  |
Deferred Tax Assets |  |
Operating loss carryforwards with definite carryover periods | 1,899 |
Operating loss carryforwards with indefinite carryover periods | 12,552 |
Operating Loss Carryforward |  |
Required future taxable income - operating loss carryforwards with definite carryover periods | 7,387 |
Required future taxable income - operating loss carryforwards with indefinite carryover periods | $ 46,066 |

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- Definition Represents the approximate future taxable income required to realize the deferred tax asset attributable to deductible operating loss carryforwards, before assessment that it is more likely than not that all or a portion of such income will not be realized on future tax returns. + References No definition available. + Details
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- Definition Represents the approximate future taxable income required to realize the deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates, before assessment that it is more likely than not that all or a portion of such income will not be realized on future tax returns. + References No definition available. + Details
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