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Stock-Based Compensation - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 21 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 28, 2023 shares | May 12, 2023 shares | Mar. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 $ / shares shares | Dec. 28, 2025 quarter | Jan. 31, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Aggregate intrinsic value of options exercised | $ |  |  | $ 16,000 |  |  |
Restricted stock units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Restricted stock units awards grant date fair value (in dollars per share) | $ / shares |  |  | $ 1.37 | $ 1.75 |  |
Number of shares vested |  |  | 1,221,562 |  |  |
Number of shares granted |  |  | 2,293,704 |  |  |
Restricted stock units | Subsequent Event |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares vested |  | 428,703 |  |  |  |
Restricted stock units | Team Members |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Restricted stock units awards grant date fair value (in dollars per share) | $ / shares |  |  | $ 0.92 | $ 0.93 |  |
Number of shares granted |  |  | 1,921,000 | 372,704 |  |
Phunware Inc 2022 Inducement Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  | $ 1,176,000 |  |  |
Weighed-average period of costs amortized |  |  | 2 years 9 months 18 days |  |  |
Phunware Inc 2022 Inducement Plan | Restricted stock units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares authorized |  |  |  |  |  | 1,470,588
Restricted stock units awards grant date fair value (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.87
Phunware Inc 2022 Inducement Plan | Restricted stock units | Subsequent Event | Forecast |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting of award (as a percent) | 33.33% |  |  |  |  |
Number of shares vested | 490,196 |  |  |  |  |
Number of installments period | quarter |  |  |  |  | 8 |
2018 Stock Option and Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  | $ 4,607,000 |  |  |
Weighed-average period of costs amortized |  |  | 1 year 10 months 24 days |  |  |
Issuance of common stock shares (in shares) |  |  | 779,531 |  |  |
Common stock reserved for issuance (in shares) |  |  | 7,267,124 | 4,382,662 |  |
2018 Employee Stock Purchase Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  | $ 295,000 |  |  |
Weighed-average period of costs amortized |  |  | 1 year 8 months 12 days |  |  |
Common stock reserved for issuance (in shares) |  |  | 1,621,717 | 802,893 |  |
2009 Stock Option and Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  | $ 400 |  |  |
Weighed-average period of costs amortized |  |  | 6 months |  |  |

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