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WARRANTS - Additional information (Details) - USD ($)	12 Months Ended
	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: