Geographic information (Details) $ in Thousands	6 Months Ended
Sep. 30, 2022 USD ($) region	Mar. 31, 2022 USD ($)
Segments, Geographical Areas [Abstract]
Number of operating geographic regions \| region	2
Geographic information
Long-lived assets	$ 7,910	$ 7,933
United States
Geographic information
Long-lived assets	6,188	6,318
United Kingdom
Geographic information
Long-lived assets	$ 1,722	$ 1,615

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Name:	us-gaap_NoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant