Fair Value Measurements - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Nov. 30, 2024	Feb. 29, 2024
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Debt Securities
Assets:
Investment	$ 10,362	$ 10,160
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	523,753	129,977
Investment	1,435	1,687
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	1,435	1,687
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	8,473
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	3,444
Recurring | Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	523,753	129,977
Investment	10,362	10,160
Recurring | Estimate of Fair Value Measurement | Debt Securities
Assets:
Investment	5,029	5,029
Recurring | Estimate of Fair Value Measurement | Equity Securities
Assets:
Investment	$ 5,333	$ 5,131