Related party transactions	12 Months Ended
	Mar. 31, 2022
Related Party Transactions [Abstract]
Related party transactions	Related party transactionsPrior to July 2019 the Company leased premises from TPF Investments Proprietary Limited (“TPF”), a company over which Robin Frew (non-executive Chairperson of the Company) exercised significant influence. A lease expense of $0.2 million was recognized during the year ended March 31, 2020. During fiscal year 2020 the Company acquired the property from TPF and sold it immediately to Black Industrialists Group Property Management Company (Pty) Ltd (“BIG”), a non-related party, as part of a Broad-Based Black Economic Empowerment transaction. The Company now leases the property from BIG.