Debt - Schedule of Undrawn Facilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Line of Credit Facility [Line Items]
Undrawn borrowing remaining	$ 1,821	$ 5,532
Standard Bank Limited | Overdraft
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	1.20%
Undrawn borrowing remaining	$ 0	2,616
Standard Bank Limited | Vehicle and asset finance
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	1.20%
Undrawn borrowing remaining	$ 587	570
Standard Bank Limited | Working capital facility
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	0.25%
Undrawn borrowing remaining	$ 544	1,676
Nedbank Limited | Overdraft
Line of Credit Facility [Line Items]
Percentage deducted from interest rate	2.00%
Undrawn borrowing remaining	$ 690	$ 670