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Stock-based compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Stock-Based Compensation - Schedule of Stock Options Valuation Assumptions | The following assumptions were used to calculate the compensation expense and the calculated fair value of stock options granted: Stock-Based Compensation - Schedule of Stock Options Valuation Assumptions
Assumption | December 31, 2022 |  | December 31, 2021 |  | December 31, 2020
Dividend yield | None |  | None |  | None
Risk-free interest rate used (average) | 1.00% |  | 1.00% |  | 1.00%
Expected market price volatility | 69.58 - 87.74% |  | 61.33 - 99.64% |  | 37.61% - 65.38%
Average remaining expected life of stock options on WIHN Class B Shares (years) | 4.25 |  | 4.31 |  | 3.43
Average remaining expected life of stock options on WIHN Class A Shares (years) | 2.40 |  | 3.40 |  | n/a
Stock-Based Compensation - Schedule of Non-Vested Share Activity | The following table illustrates the development of the Group’s non-vested options for the years ended December 31, 2022 and 2021. Stock-Based Compensation - Schedule of Non-Vested Share Activity
| Options on WIHN Class B Shares |  | Options on WIHN Class A Shares
Non-vested options | Number of shares under options | Weighted-average grant date fair value (USD) |  | Number of shares under options | Weighted-average grant date fair value (USD)
Non-vested options as at December 31, 2020 | 133,333 | 1.20 |  | — | —
Granted | 2,029,821 | 0.95 |  | 9,818,000 | 0.19
Vested | (1,946,488) | 0.98 |  | (9,818,000) | 0.19
Non-vested forfeited or cancelled | (100,000) | 1.05 |  | - | -
Non-vested options as at December 31, 2021 | 116,666 | 1.28 |  | — | 0.19
Granted | 4,054,980 | 0.17 |  | - | -
Vested | (4,084,646) | 0.18 |  | - | -
Non-vested forfeited or cancelled | - | - |  | - | -
Non-vested options as at December 31, 2022 | 87,000 | 0.75 |  | - | -
Stock-Based Compensation - Schedule of Stock Option Activity | The following tables summarize the Group’s stock option activity for the years ended December 31, 2022 and 2021. Stock-Based Compensation - Schedule of Stock Option Activity
Options on WIHN Class B Shares | WIHN Class B Shares under options |  | Weighted- average exercise price (USD) |  | Weighted average remaining contractual term (in years) |  | Aggregate intrinsic value (USD)
Outstanding as at December 31, 2020 | 2,096,330 |  | 1.48 |  | 4.44 |  | 554,377
Of which vested | 1,962,997 |  | 1.57 |  | 4.31 |  | 329,716
Of which non-vested | 133,333 |  | - |  | - |  | -
Granted | 2,029,821 |  | 0.15 |  | - |  | -
Exercised or converted | (78,944) |  | 0.05 |  | - |  | 61,125
Forfeited or cancelled | (112,000) |  | 0.05 |  | - |  | -
Expired | (123,563) |  | 4.79 |  | - |  | -
Outstanding as at December 31, 2021 | 3,811,644 |  | 0.71 |  | 5.28 |  | 2,468,898
Of which vested | 3,694,978 |  | 0.69 |  | 5.25 |  | 2,455,994
Of which non-vested | 116,666 |  | - |  | - |  | -
Granted | 4,054,980 |  | 0.05 |  | - |  | -
Exercised or converted | (312,828) |  | 0.05 |  | - |  | 39,661
Forfeited or cancelled | - |  | - |  | - |  | -
Expired | (522,042) |  | 4.36 |  | - |  | -
Outstanding as at December 31, 2022 | 7,031,754 |  | 0.06 |  | 6.10 |  | 887,345
Of which vested | 6,944,754 |  | 0.06 |  | 6.11 |  | 878,378
Of which non-vested | 87,000 |  | - |  | - |  | -
Options on WIHN Class A Shares | WIHN Class A Shares under options | Weighted- average exercise price (USD) | Weighted average remaining contractual term (in years) | Aggregate intrinsic value (USD)
Outstanding as at December 31, 2020 | — | — | — | —
Granted | 9,818,000 | 0.01 | - | -
Outstanding as at December 31, 2021 | 9,818,000 | 0.01 | 6.90 | 1,520,393
Of which vested | 9,818,000 | 0.01 | 6.90 | 1,520,393
Granted | - | - | - | -
Outstanding as at December 31, 2022 | 9,818,000 | 0.01 | 5.90 | 248,950
Of which vested | 9,818,000 | 0.01 | 5.90 | 248,950
Stock-Based Compensation - Schedule of Stock-Based Compensation Expense | Summary of stock-based compensation expenses Stock-Based Compensation - Schedule of Stock-Based Compensation Expense
Stock-based compensation expenses from continuing operations | 12 months ended December 31,
USD’000 | 2022 |  | 2021 |  | 2020
In relation to Employee Stock Option Plans (ESOP) | 743 |  | 3,761 |  | 363
In relation to non-ESOP Option Agreements | 1 |  | 22 |  | 30
Total | 744 |  | 3,783 |  | 393
Stock-based compensation expenses are recorded under the following expense categories in the income statement. Research & Development Expenses Selling & Marketing Expenses General & Administrative Expenses
Stock-based compensation expenses from continuing operations | 12 months ended December 31,
USD’000 | 2022 |  | 2021 |  | 2020
Research & development expenses | 177 |  | 485 |  | 6
Selling & marketing expenses | 280 |  | 820 |  | 209
General & administrative expenses | 287 |  | 2,478 |  | 178
Total | 744 |  | 3,783 |  | 393

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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