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Employee Retirement Plan (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Retirement Benefits [Abstract] |  |
Employee retirement plan, description | The plan provides for Company matching of employee contributions up to 5% of eligible earnings. |
Contribution expense | $ 2.3 | $ 1.3

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- Definition Contribution expense. + References No definition available. + Details
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Namespace Prefix: | prpl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Description of nature and type of retirement benefits. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration