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Stock-based compensation (Tables)
 12 Months Ended
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:

 

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.

 

  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.

 

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 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.

 

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