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The Company and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jan. 03, 2024 | Jan. 02, 2024 | Dec. 15, 2023 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
The Company and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net losses |  |  |  | $ (1,210) | $ (1,829) | $ (471) | $ (2,712) | $ (4,425) | $ (2,031) | $ (3,510) | $ (9,168) |
Accumulated deficit |  |  |  | (180,630) |  |  |  |  |  | $ (180,630) |  | $ (177,120)
Reverse stock split |  | 1-for-40 | 1-for-40 |  |  |  |  |  |  |  |  |
Percentage of allowance on invoice value |  |  |  |  |  |  |  |  |  | 100.00% |  |
Allowance for doubtful accounts receivable |  |  |  | $ 16,500 |  |  |  |  |  | $ 16,500 |  | 30,000
Liquidity [Member] |  |  |  |  |  |  |  |  |  |  |  |
The Company and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net losses |  |  |  |  |  |  |  |  |  | $ (3,500) |  | $ (10,700)
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
The Company and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  | 3 years |  |  |  |  |  | 3 years |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
The Company and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  | 10 years |  |  |  |  |  | 10 years |  |
Common Stock and Exchangeable Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |
The Company and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of pre-reverse split shares (in Shares) | 40 |  |  |  |  |  |  |  |  |  |  |
Product Shipments [Member] |  |  |  |  |  |  |  |  |  |  |  |
The Company and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue recognized |  |  |  |  |  |  |  |  |  | $ 333,400 |  |

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Name: | srt_ProductOrServiceAxis=prso_ProductShipmentsMember
Namespace Prefix: |
Data Type: | na
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Period Type: |