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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of digital assets | $ 0 | $ 0 | $ 21,511 | $ 776 |
Digital Assets |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Aggregate cost basis of digital currency holdings | 42,280 |  | 42,280 |  | $ 41,964
Digital Assets | Other Digital Assets |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Aggregate cost basis of digital currency holdings | $ 1,223 |  | $ 1,223 |  | $ 287

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- Definition Impairment of Digital Assets + References No definition available. + Details
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Namespace Prefix: | phun_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Indefinite-Lived Intangible Assets, Cost Basis + References No definition available. + Details
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Namespace Prefix: | phun_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Balance Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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