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Right of use of assets - Narrative (Details) | 1 Months Ended | 9 Months Ended |  |  |
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Aug. 31, 2022 | Aug. 31, 2021 USD ($) ft² | Feb. 28, 2021 GBP (£) | Nov. 30, 2019 GBP (£) | May 31, 2019 ft² | Sep. 30, 2022 GBP (£) | Aug. 01, 2022 | Jun. 21, 2022 | Jul. 31, 2021
Eastbourne Terrace, London, UK |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Annual lease payment |  |  |  | £ 780,000 |  |  |  |  |
Refundable lease deposit |  |  |  | £ 130,000 |  |  |  |  |
Lease rental relief |  |  | £ 32,500 |  |  |  |  |  |
New York, NY |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Net rentable area | ft² |  |  |  |  | 200 |  |  |  |
Lease cancellation notification period (in days) |  |  |  |  | 30 days |  |  |  |
Soho, London, UK |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  |  |  | 2 years
Refundable lease deposit |  |  |  |  |  | £ 136,200 |  |  |
Operating leases, noncancelable term |  |  |  |  |  | 24 months |  |  |
Operating lease, monthly payment |  |  |  |  |  | £ 136,200 |  |  |
San Francisco, CA |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Net rentable area | ft² |  | 2,526 |  |  |  |  |  |  |
Refundable lease deposit | $ |  | $ 20,000 |  |  |  |  |  |  |
Operating lease, monthly payment | $ |  | 10,000 |  |  |  |  |  |  |
Advance rent upon lease execution | $ |  | $ 9,000 |  |  |  |  |  |  |
Denmark Hill, London, UK |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  |  | 5 years |
Operating lease, annual payment |  |  |  |  |  | £ 180,000 |  |  |
WeWork |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |
Lease cancellation notification period (in days) | 90 days |  |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  | 12 months |  |

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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