Fair Value Measurements - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	May 31, 2025	Feb. 28, 2025
Estimate of Fair Value Measurement \| Significant Unobservable Inputs (Level 3) \| Debt Securities
Assets:
Investment	$ 10,369	$ 9,912
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	223,230	279,052
Investment	1,442	985
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Debt Securities
Assets:
Investment	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Equity Securities
Assets:
Investment	1,442	985
Recurring \| Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	0	0
Investment	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Debt Securities
Assets:
Investment	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Equity Securities
Assets:
Investment	0	0
Recurring \| Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	0	0
Investment	8,927	8,927
Recurring \| Significant Unobservable Inputs (Level 3) \| Debt Securities
Assets:
Investment	5,029	5,029
Recurring \| Significant Unobservable Inputs (Level 3) \| Equity Securities
Assets:
Investment	3,898	3,898
Recurring \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	223,230	279,052
Investment	10,369	9,912
Recurring \| Estimate of Fair Value Measurement \| Debt Securities
Assets:
Investment	5,029	5,029
Recurring \| Estimate of Fair Value Measurement \| Equity Securities
Assets:
Investment	$ 5,340	$ 4,883