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EQUITY - Rights of the common shares gross proceeds (Details)	6 Months Ended
	Jun. 30, 2025 Vote
EQUITY
Number of vote per share	1

X

- Definition

Represents the number of votes per common share.

+ References

No definition available.

+ Details

Name:	pmn_NumberOfVotesPerCommonShare
Namespace Prefix:	pmn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration