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Other current liabilities | 12 Months Ended
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Dec. 31, 2021
Other current liabilities [Abstract] |
Other current liabilities | 12. Other current liabilities As of December 31, 2021, and 2020, other current liabilities consist of the following:
|  | December 31, 2021 |  |  | December 31, 2020 |
Accrued expenses (1) |  | $ | 5,903,225 |  |  | $ | 814,965 |
Other short-term payables (2) |  |  | 4,589,986 |  |  |  | 64,386 |
Taxes and duties payable |  |  | 1,235,830 |  |  |  | 5,662 |
Provision for unused vacation (3) |  |  | 423,788 |  |  |  | 5,269 |
Accrued provision for warranties, current portion |  |  | 208,257 |  |  |  | - |
Social security funds |  |  | 84,048 |  |  |  | 14,097 |
Overtime provision |  |  | 68,636 |  |  |  | - |
|  | $ | 12,513,770 |  |  | $ | 904,379 |
(1) Accrued expenses are analyzed as follows:
|  | December 31, 2021 |  |  | December 31, 2020 |
Accrued bonus |  | $ | 3,602,993 |  |  | $ | - |
Accrued construction fees |  |  | 1,284,857 |  |  |  | - |
Accrued expenses for legal and consulting fees |  |  | 334,300 |  |  |  | 814,965 |
Accrued payroll fees |  |  | 129,240 |  |  |  | - |
Other accrued expenses |  |  | 551,835 |  |  |  | - |
|  | $ | 5,903,225 |  |  | $ | 814,965 |
Accrued construction fees as of December 31, 2021 relate to accrued fees for the design and construction of the Company’s leased workspace at Hood Park in Charlestown, as discussed in Note 7. (2) Other short-term payables as of December 31, 2021 include an amount of $4,366,802, which is payable to F.E.R. fischer Edelstahlrohre GmbH to complete the acquisition of SerEnergy and FES, as discussed in Note 3(c). (3) The movement of the provision for unused vacation is analyzed as follows:
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |
Balance at beginning of year |  | $ | 5,269 |  |  | $ | 11,158 |
Assumed at business combination |  |  | 790,538 |  |  |  | - |
Additions during the year |  |  | 120,064 |  |  |  | - |
Income from unused provisions during the year |  |  | - |  |  |  | (6,442 | )
Utilized provisions during the year |  |  | (462,808 | ) |  |  | - |
Exchange differences |  |  | (29,275 | ) |  |  | 553 |
Balance at end of year |  | $ | 423,788 |  |  | $ | 5,269 |

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