Related party transactions (Details) - Affiliated Entity - Common Stock - Phoenix Venture Partners II, L.P $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($) $ / shares shares
Related Party Transaction
Issuance of shares upon warrant exercise (in shares) \| shares	307,211
Class of warrant or right, exercise price of warrants or rights (usd per share) \| $ / shares	$ 0.3027
Issuance of shares upon warrant exercise, value \| $	$ 0.1

Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant