FAIR VALUE (Tables)

12 Months Ended

Feb. 28, 2023

FAIR VALUE

Schedule of inputs for fair value measurements of assets

	Fair Value Measurement at Reporting Date Using
			Quoted Prices in		Significant Other		Significant
	February 28,		Active Market for		Observable		Unobservable
Description	2022		Identical Assets		Inputs		Inputs
			(Level 1)		(Level 2)		(Level 3)
Short-term investments
Variable-rate financial instruments	$	150,000		—	$	150,000		—
Available-for-sale investments	$	340,183		—	$	340,183		—
Long-term investments
Equity securities with readily determinable fair values	$	16,723	$	14,606	$	2,117		—
Fair value option investment	$	17,735		—	$	17,419	$	316
Available-for-sale investments	$	134,034		—		—	$	134,034
Total	$	658,675	$	14,606	$	509,719	$	134,350

	Fair Value Measurement at Reporting Date Using
			Quoted Prices in		Significant Other		Significant
	February 28,		Active Market for		Observable		Unobservable
Description	2023		Identical Assets		Inputs		Inputs
			(Level 1)		(Level 2)		(Level 3)
Short-term investments
Variable-rate financial instruments	$	793,275		—	$	793,275		—
Available-for-sale investments	$	80,044		—	$	80,044		—
Long-term investments
Equity securities with readily determinable fair values	$	5,890	$	5,890	$	—		—
Fair value option investment	$	92,788		—	$	92,500	$	288
Available-for-sale investments	$	106,387		—		—	$	106,387
Total	$	1,078,384	$	5,890	$	965,819	$	106,675

Schedule of roll forward of Level 3 instruments

	US$
Balance as of February 28, 2021	$	369,449
Purchases		13,616
Disposal		(2,219)
Changes in fair value		(41,698)
Impairment loss		(204,807)
Foreign exchange difference		9
Balance as of February 28, 2022	$	134,350
Purchases		6,845
Disposal		(8,710)
Transfer in due to reclassification		941
Changes in fair value		(16,752)
Impairment loss		(6,495)
Foreign exchange difference		(3,504)
Balance as of February 28, 2023	$	106,675