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v3.25.2

SHARE-BASED COMPENSATION - Share-based compensation liability activity (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024
SHARE-BASED COMPENSATION |  |
Beginning balance | $ 199,263 | $ 422,002
Increase in additional paid-in-capital due to decrease in fair value of share-based compensation liability | (136,868) | (222,739)
Ending balance | $ 62,395 | $ 199,263

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
Name: | pmn_DecreaseInFairValueOfShareBasedCompensationLiabilityIncreaseInAdditionalPaidInCapital
Namespace Prefix: | pmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
Name: | us-gaap_DeferredCompensationSharebasedArrangementsLiabilityClassifiedNoncurrent
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