v3.26.3

Staff Costs and Employee Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Staff Costs and Employee Information [Abstract]
Wages and salaries for restructuring costs	$ 2.6

X

- Definition

Staff Costs and Employee Information [Abstract]

+ References

No definition available.

+ Details

Name:	namm_StaffCostsAndEmployeeInformationAbstract
Namespace Prefix:	namm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Wages and salaries for restructuring costs.

+ References

No definition available.

+ Details

Name:	namm_WagesAndSalariesForRestructuringCosts
Namespace Prefix:	namm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration