Short-term Investments - Summary of Amortized Cost and Estimated Fair Value of Investment Securities Classified as Held-to-maturity (Details) - USD ($) $ in Thousands	Nov. 30, 2023	Feb. 28, 2023
Short-Term Investments [Abstract]
Investment securities due in less than one year, cost or amortized cost	$ 18,495	$ 0
Investment securities due in less than one year, gross unrealized holding gains	0	0
Investment securities due in less than one year, gross unrealised holding losses	4	0
Investment securities due in less than one year, estimated fair value	$ 18,491	$ 0