Share-based compensation (Tables)

12 Months Ended

Mar. 31, 2022

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, 2020 and 2021:

	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, 2020		4,856,972			2.26		6.67		39,472		2.72
Exercisable as of March 31, 2020		—			—
Granted		998,000			4.13						2.49
Forfeited		(342,750	)		3.49						4.00
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		—			—

Summary of Options Measured At Fair Value, Valuation Assumptions

The significant unobservable inputs adopted in the valuation as of March 31, 2021 and 2022 are as follows:

	As of March 31, 2021	As of March 31, 2022
Spot price (US$)	5.57, 7.19	0.44, 6.93
Risk-free rate	0.00%, 0.9%	1.25%, 2.5%
Expected volatility	41.05%, 52.33%,	57.95%, 48.15%
Expected expiry years (in years)	0.50, 4.56	0.50, 3.56

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, 2021	Year ended March 31, 2022
Expected volatility	44.41%	42.22%-43.71%
Risk-free interest rate	0.94%	1.64%-1.87%
Exercise multiple	2.8/2.2	2.8/2.2
Expected dividend yield	0%	0%
Contractual term (in years)	10	10