Income Taxes - Deferred Tax Assets (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Changes in the valuation allowance for deferred tax assets | ||
| Valuation allowance as of end of year | $ 200,000 | |
| Evolv Technologies Holdings Inc [Member] | ||
| Unrecognized Tax Benefits | 0 | |
| Changes in the valuation allowance for deferred tax assets | ||
| Valuation allowance as of beginning of year | 16,767,000 | $ 12,157,000 |
| Additions (deductions) charged to provision for income taxes | 9,233,000 | 4,611,000 |
| Currency translation and other | 5,000 | (1,000) |
| Valuation allowance as of end of year | 26,005,000 | 16,767,000 |
| Accrued interest or penalties related to uncertain tax positions | 0 | 0 |
| Interest or penalties expense related to uncertain tax positions | $ 0 | $ 0 |
| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for currency translation and other for a specified deferred tax asset. No definition available.
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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