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v3.23.3

ACCRUED EXPENSES OTHER CURRENT LIABILITIES (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
ACCRUED EXPENSES OTHER CURRENT LIABILITIES [Abstract] |  |  |  |
Reduction in certain accrued expense and accounts payable | $ 0 | $ 3,000 | $ 0 | $ 4,000

X
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Namespace Prefix: | prpo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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