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Stock-Based Compensation - Narrative (Details) |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended | 21 Months Ended |
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Jun. 03, 2024 | Dec. 28, 2023 shares | Oct. 25, 2023 shares | Jun. 30, 2023 $ / shares shares | Sep. 30, 2023 USD ($) installment $ / shares shares | Jun. 30, 2023 $ / shares shares | Mar. 31, 2023 $ / shares shares | Sep. 30, 2023 USD ($) $ / shares shares | Jun. 01, 2026 annual | 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] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares granted (in shares) |  |  |  |  |  |  |  | 6,211,386 |  |  |  |
Restricted stock units awards grant date fair value (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 0.53 |  |  |  |
Restricted stock units awards grant date fair value (in dollars per share) | $ / shares |  |  |  |  | $ 0.62 |  |  | $ 0.62 |  | $ 1.75 |  |
Number of shares vested (in shares) |  |  |  |  |  |  |  | 3,215,131 |  |  |  |
Number of shares terminated (in shares) |  |  |  |  |  |  |  | 578,574 |  |  |  |
Restricted stock units | Team Members |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares granted (in shares) |  |  |  |  | 3,533,000 | 323,000 | 1,921,000 |  |  | 372,704 |  |
Restricted stock units awards grant date fair value (in dollars per share) | $ / shares |  |  |  | $ 0.60 | $ 0.28 | $ 0.60 | $ 0.92 | $ 0.28 |  | $ 0.93 |  |
Vesting of award (as a percent) |  |  |  |  |  |  | 33.33% |  |  |  |  |
Restricted stock units | Consultant |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares granted (in shares) |  |  |  |  | 61,682 |  |  |  |  |  |  |
Phunware Inc 2023 Inducement Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  |  |  | $ 295,000 |  |  | $ 295,000 |  |  |  |
Weighed-average period of costs amortized |  |  |  |  |  |  |  | 2 years 8 months 12 days |  |  |  |
Number of shares authorized (in shares) |  |  |  | 600,000 |  | 600,000 |  |  |  |  |  |
Phunware Inc 2023 Inducement Plan | Restricted stock units |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares granted (in shares) |  |  |  | 600,000 |  |  |  |  |  |  |  |
Restricted stock units awards grant date fair value (in dollars per share) | $ / shares |  |  |  | $ 0.54 |  |  |  |  |  |  |  |
Phunware Inc 2023 Inducement Plan | Restricted stock units | Subsequent Event | Forecast |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting of awards, number of installments | annual |  |  |  |  |  |  |  |  | 2 |  |  |
Vesting of award (as a percent) | 33.33% |  |  |  |  |  |  |  |  |  |  |
Phunware Inc 2022 Inducement Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  |  |  | $ 958,000 |  |  | $ 958,000 |  |  |  |
Weighed-average period of costs amortized |  |  |  |  |  |  |  | 2 years 2 months 12 days |  |  |  |
Phunware Inc 2022 Inducement Plan | Restricted stock units |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  |  | 1,470,588
Vesting of awards, number of installments | installment |  |  |  |  | 3 |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares vested (in shares) |  |  | 500,000 |  |  |  |  |  |  |  |  |
Number of shares terminated (in shares) |  |  | 470,588 |  |  |  |  |  |  |  |  |
Phunware Inc 2022 Inducement Plan | Restricted stock units | Subsequent Event | Vesting on November 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unvested awards (in shares) |  |  | 500,000 |  |  |  |  |  |  |  |  |
Phunware Inc 2022 Inducement Plan | Restricted stock units | Subsequent Event | Forecast |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting of awards, number of installments | quarter |  |  |  |  |  |  |  |  |  |  | 8 |
Number of shares vested (in shares) |  | 490,196 |  |  |  |  |  |  |  |  |  |
Vesting of award (as a percent) |  | 33.33% |  |  |  |  |  |  |  |  |  |
2018 Stock Option and Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  |  |  | $ 2,830,000 |  |  | $ 2,830,000 |  |  |  |
Weighed-average period of costs amortized |  |  |  |  |  |  |  | 2 years 4 months 24 days |  |  |  |
Issuance of common stock shares (in shares) |  |  |  |  |  |  |  | 755,510 |  |  |  |
Common stock reserved for issuance (in shares) |  |  |  |  | 3,870,016 |  |  | 3,870,016 |  | 4,382,662 |  |
2018 Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  |  |  | $ 124,000 |  |  | $ 124,000 |  |  |  |
Weighed-average period of costs amortized |  |  |  |  |  |  |  | 1 year 8 months 12 days |  |  |  |
Common stock reserved for issuance (in shares) |  |  |  |  | 1,528,745 |  |  | 1,528,745 |  | 802,893 |  |
2009 Stock Option and Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized stock compensation expense | $ |  |  |  |  | $ 0 |  |  | $ 0 |  |  |  |
Weighed-average period of costs amortized |  |  |  |  |  |  |  | 0 years |  |  |  |

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