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Deferred Underwriting Compensation - Additional Information (Details) - Gores Metropoulos, Inc. - USD ($) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2020 | Dec. 31, 2019
Deferred underwriting compensation | $ 14,000,000 | $ 14,000,000
Percentage of deferred underwriting discount | 3.50% | 3.50%
Deferred underwriting discount if business combination not completed | $ 0 | $ 0

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- Definition Deferred underwriting compensation liability, noncurrent. + References No definition available. + Details
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Namespace Prefix: | lazr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Deferred underwriting discount if business combination not completed. + References No definition available. + Details
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Namespace Prefix: | lazr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Percentage of deferred underwriting discount. + References No definition available. + Details
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Namespace Prefix: | lazr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |