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WARRANTS - Additional information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
WARRANTS |  |
Number of warrants expired | 407,978 | 100,073
Pre- funded warrants |  |
WARRANTS |  |
Number of warrants exercised | 2,803,738 | 360,000
Proceeds from issuance of warrants net of issuance costs | $ 28,038 | $ 3,600

X
- Definition Number of warrants or rights exercised. + References No definition available. + Details
Name: | pmn_ClassOfWarrantOrRightExercised
Namespace Prefix: | pmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights expired. + References No definition available. + Details
Name: | pmn_ClassOfWarrantOrRightExpired
Namespace Prefix: | pmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt) net of issuance costs. + References No definition available. + Details
Name: | pmn_ProceedsFromIssuanceOfWarrantsNetOfIssuanceCosts
Namespace Prefix: | pmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=pmn_PreFundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |