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Segment information (Tables) | 12 Months Ended
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Dec. 31, 2022
Disclosure of operating segments [abstract] |
Schedule of results of each reportable segment |
|  | Prevention |  |  | Diagnostics |  |  | Unallocated |  |  | Total |
|  | $ |  |  | $ |  |  | $ |  |  | $ |
2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 15,774,457 |  |  |  | 259,986,841 |  |  |  | — |  |  |  | 275,761,298 |
Gross profit |  |  | 6,538,453 |  |  |  | 127,180,380 |  |  |  | (2,163,947 | ) |  |  | 131,554,886 |
2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 16,571,535 |  |  |  | 259,281,218 |  |  |  | — |  |  |  | 275,852,753 |
Gross profit |  |  | 7,546,593 |  |  |  | 100,125,889 |  |  |  | (1,541,271 | ) |  |  | 106,131,211 |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 14,264,972 |  |  |  | 50,914,543 |  |  |  | — |  |  |  | 65,179,515 |
Gross profit |  |  | 6,332,833 |  |  |  | 20,983,200 |  |  |  | (971,214 | ) |  |  | 26,344,819 |
Schedule of revenue and non-current assets by regions |
(i) | Revenue
Revenue by regions were as follows:
|  | 2022 |  |  | 2021 |  |  | 2020 |
|  | $ |  |  | $ |  |  | $ |
Hong Kong |  |  | 210,934,144 |  |  |  | 124,926,420 |  |  |  | 35,411,518 |
United Kingdom |  |  | 64,827,154 |  |  |  | 150,926,333 |  |  |  | 29,767,997 |
Total revenue |  |  | 275,761,298 |  |  |  | 275,852,753 |  |  |  | 65,179,515 |
(ii) | Non-current assets
Non-current assets (excluding interests in associates and deferred tax assets) by regions were as follows:
|  | 2022 |  |  | 2021 |  |  | 2020 |
|  | $ |  |  | $ |  |  | $ |
Hong Kong |  |  | 67,151,416 |  |  |  | 10,993,322 |  |  |  | 3,419,570 |
United Kingdom |  |  | 1,816,121 |  |  |  | 30,334,739 |  |  |  | 29,510,377 |
Rest of the world |  |  | 321,456 |  |  |  | 207,026 |  |  |  | 45,460 |
Total non-current assets |  |  | 69,288,993 |  |  |  | 41,535,087 |  |  |  | 32,975,407 |

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