Short-term Investments and Fair Value Measurements - Summary of Amortized Cost and Estimated Fair Value of Investment Securities Classified as Held-to-maturity (Details) - USD ($) $ in Thousands	May 31, 2025	Feb. 28, 2025
Short-Term Investments [Abstract]
Investment securities due in less than one year, cost or amortized cost	$ 0	$ 5,475
Investment securities due in less than one year, gross unrealized holding gains	0	4
Investment securities due in less than one year, gross unrealised holding losses	0	0
Investment securities due in less than one year, estimated fair value	$ 0	$ 5,479