Debt - Schedule of Undrawn Facilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Line of Credit Facility [Line Items]
Undrawn borrowing remaining	$ 23,455	$ 1,821
Standard Bank Limited | Overdraft
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	1.20%
Undrawn borrowing remaining	$ 224	0
Standard Bank Limited | Vehicle and asset finance
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	1.20%
Undrawn borrowing remaining	$ 473	587
Standard Bank Limited | Working capital facility
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	0.25%
Undrawn borrowing remaining	$ 1,390	544
Nedbank Limited | Overdraft
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	2.00%
Undrawn borrowing remaining	$ 556	690
Investec Limited | General committed banking facility
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	1.50%
Undrawn borrowing remaining	$ 10,812	0
Investec Limited | General uncommitted banking facility
Line of Credit Facility [Line Items]
Undrawn borrowing remaining	$ 10,000	$ 0