Stock-based compensation plan (Tables)

6 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Summary of Unvested SARs Activities

The following table summarizes the activities for the outstanding SARs:

	Number of SARs	Weighted- Average Exercise Price in U.S. Cents*	Weighted Average Contractual Remaining Term (years)	Aggregate Intrinsic Values (in thousands)
Outstanding as of April 1, 2021	40,567,917	36
Exercised	(1,392,917)	21
Forfeited	(300,000)	46
Outstanding as of September 30, 2021	38,875,000	37	2.87
Vested and expected to vest as of September 30, 2021	37,762,500	37	2.06	5,857
Vested as of September 30, 2021	16,625,000	28	1.48	3,799