Stock Based Compensation - Stock options activity (Details) - Evolv Technologies Holdings Inc [Member] - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | ||||
| Outstanding as of December 31, 2020 | 49,679,554 | 29,488,684 | 29,488,684 | |
| Granted | 17,130,123 | 24,558,325 | ||
| Exercised | (4,137,451) | (3,236,374) | ||
| Forfeited | (75,000) | (1,131,081) | ||
| Outstanding as of March 31, 2021 | 62,597,226 | 49,679,554 | 29,488,684 | |
| Vested and expected to vest | 62,597,226 | 49,679,554 | 29,488,684 | |
| Options exercisable | 22,901,452 | 26,519,727 | 15,663,415 | |
| Weighted Average Exercise Price | ||||
| Outstanding as of December 31, 2020 | $ 0.14 | $ 0.12 | $ 0.12 | |
| Granted | 0.16 | 0.16 | ||
| Exercised | 0.11 | 0.14 | ||
| Forfeited | 0.16 | 0.15 | ||
| Outstanding as of March 31, 2021 | 0.15 | 0.14 | $ 0.12 | |
| Vested and expected to vest | 0.15 | 0.14 | 0.12 | |
| Options exercisable | $ 0.13 | $ 0.12 | $ 0.11 | |
| Weighted Average Remaining Contractual Term (in years) | ||||
| Outstanding as of December 31, 2020 | 8 years 7 months 6 days | 8 years 2 months 27 days | 7 years 10 months 24 days | |
| Granted | 9 years 9 months 11 days | 9 years 7 months 17 days | ||
| Exercised | 6 years 8 months 19 days | 6 years 7 months 6 days | ||
| Vested and expected to vest | 8 years 7 months 6 days | 8 years 2 months 27 days | 7 years 10 months 24 days | |
| Options exercisable | 7 years 4 months 10 days | 7 years 1 month 13 days | 7 years 3 months 11 days | |
| Aggregate Intrinsic Value | ||||
| Outstanding as of December 31, 2020 | $ 1,073,000.000 | $ 1,149,000 | $ 1,149,000 | |
| Exercised | 12,123,000.000 | $ 100,000 | 75,000 | |
| Forfeited | 216,000.000 | 14,000 | ||
| Outstanding as of March 31, 2021 | 169,734,000.000 | 1,073,000.000 | $ 1,149,000 | |
| Vested and expected to vest | 169,734,000.000 | 1,073,000 | 1,149,000 | |
| Options exercisable | $ 66,545,000.000 | $ 1,224,000 | $ 817,000 | |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards Exercised, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the forfeited of options outstanding. No definition available.
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards granted, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
|
| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
|
| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
|
| X | ||||||||||
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|