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SHARE-BASED COMPENSATION - Share-based compensation liability activity (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
SHARE-BASED COMPENSATION |  |
Fair value at the beginning | $ 422,002 |
Share-based compensation liability of C$ options at reclassification on change in functional currency |  | $ 1,768,515
Reduction in share-based compensation expense due to decrease in fair value of share-based compensation liability |  | (332,603)
Increase in additional paid-in-capital due to decrease in fair value of share-based compensation liability | (222,739) | (1,013,910)
Fair value at the end | $ 199,263 | $ 422,002

X
- Definition The amount of increase in additional paid in capital due to decrease in fair value of share based compensation liability. + References No definition available. + Details
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Namespace Prefix: | pmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of reduction in share based compensation expense due to decrease in fair value of share based compensation liability. + References No definition available. + Details
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Namespace Prefix: | pmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of share-based compensation liability of options at reclassification on change in functional currency. + References No definition available. + Details
Name: | pmn_ShareBasedCompensationLiabilityOfOptionsAtReclassificationOnChangeInFunctionalCurrency
Namespace Prefix: | pmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable after one year (or the operating cycle, if longer). + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration