Share-based compensation (Tables)

12 Months Ended

Mar. 31, 2023

Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]

Summary of Stock Option Activity

The following table sets forth the share options activity for the years ended March 31, 2022 and 2023:

	Number of shares			Weighted average exercise price		Weighted average remaining contractual term		Aggregate intrinsic value		Weighted average fair value
				US$				US$		US$
Outstanding as of March 31, 2021		5,512,222			3.36		6.32		29,360		3.28
Exercisable as of March 31, 2021		—			—		—		—		—
Granted		1,282,500			2.86						2.27
Exercised		(1,204,483	)		1.09						0.73
Forfeited		(358,348	)		2.86						3.83
Outstanding as of March 31, 2022		5,231,891			2.86		5.25		404		2.36
Exercisable as of March 31, 2022		—			—		—		—		—
Exercised		(53,488	)		0.60						2.26
Forfeited		(1,233,050	)		1.31						0.86
Outstanding as of March 31, 2023		3,945,354			2.58		3.45		124		2.06
Exercisable as of March 31, 2023		—			—		—		—		—

Summary of Options Measured At Fair Value, Valuation Assumptions

The significant unobservable inputs adopted in the valuation as of March 31, 2022 and 2023 are as follows:

	As of March 31, 2022	As of March 31, 2023
Spot price (US$)	0.44, 6.93	5.90
Risk-free rate	1.25%, 2.5%	3.83%
Expected volatility	57.95%, 48.15%	61.13%
Expected expiry years (in years)	0.50, 3.56	2.60

Employees and Non Employees [Member]

Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]

Summary of Options Measured At Fair Value, Valuation Assumptions

	Year ended March 31, 2022
Expected volatility	42.22% - 43.71%
Risk-free interest rate	1.62% - 1.86%
Exercise multiple	2.8/2.2
Expected dividend yield	0%
Contractual term (in years)	10