Fair Value Measurements - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	May 31, 2026	Feb. 28, 2026
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Debt Securities
Assets:
Investment	$ 5,090	$ 5,704
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	440,922	179,889
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities
Assets:
Investment	1,192	1,806
Recurring | Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	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
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	440,922	179,889
Recurring | Estimate of Fair Value Measurement | Equity Securities
Assets:
Investment	$ 5,090	$ 5,704