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Prepaid expenses and other current assets (Details) | Dec. 31, 2021 USD ($) | Aug. 31, 2021 ft² | Mar. 08, 2021 USD ($) ft² | Feb. 04, 2021 ft² | Dec. 31, 2020 USD ($)
--- | --- | --- | --- | --- | ---
Prepaid Expenses [Abstract] |  |  |  |  |
Prepaid insurance expenses | $ 354,978 |  |  |  | $ 383
Prepaid research expenses | 494,813 |  |  |  | 0
Prepaid rent expenses | 98,520 |  |  |  | 0
Other prepaid expenses | 191,783 |  |  |  | 1,341
Total | 1,140,094 |  |  |  | 1,724
Other Current Assets [Abstract] |  |  |  |  |
VAT receivable | 980,518 |  |  |  | 259,831
Withholding tax | 108,350 |  |  |  | 0
Grants receivable | 509,399 |  |  |  | 95,064
Purchases under receipt | 274,330 |  |  |  | 24,488
Guarantees | 24,234 |  |  |  | 0
Other receivables | 2,835,833 |  |  |  | 115,638
Total | 4,732,664 |  |  |  | $ 495,021
Lease agreement | ft² |  | 1,017 | 21,401 | 6,041 |
Design and construction expenses will be reimbursed by lessor |  |  | $ 7,700,000 |  |
Other receivables relating to the expenses reimbursable by the lessor | $ 2,600,000 |  |  |  |

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