Fair Value Measurements - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Aug. 31, 2024	Feb. 29, 2024
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Debt Securities
Assets:
Investment	$ 10,018	$ 10,160
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	432,564	129,977
Investment	1,545	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	1,545	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	8,473	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	3,444	3,444
Recurring | Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	432,564	129,977
Investment	10,018	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	$ 4,989	$ 5,131