Income Taxes - Deferred Tax Assets (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Jun. 30, 2021 |
|
| Unrecognized Tax Benefits | $ 0 | ||
| Changes in the valuation allowance for deferred tax assets | |||
| Valuation allowance as of end of year | $ 200,000 | ||
| Accrued interest or penalties related to uncertain tax positions | $ 0 | ||
| Evolv Technologies Holdings, Inc. | |||
| 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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| X | ||||||||||
- 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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| X | ||||||||||
- 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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| X | ||||||||||
- Details
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