v3.26.1

LEASES - Narrative (Details)	6 Months Ended
LEASES - Narrative (Details)	Jun. 30, 2026 lease
Leases [Abstract]
Number of operating leases	8
Number of finance leases	32
Number of subleases	3

Lessee, Operating Lease, Number Of Finance Leases

No definition available.

Name:	mrmd_LesseeOperatingLeaseNumberOfFinanceLeases
Namespace Prefix:	mrmd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Lessee, Operating Lease, Number Of Operating Leases

No definition available.

Name:	mrmd_LesseeOperatingLeaseNumberOfOperatingLeases
Namespace Prefix:	mrmd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Lessor, Operating Lease, Number Of Sub-Leases

No definition available.

Name:	mrmd_LessorOperatingLeaseNumberOfSubLeases
Namespace Prefix:	mrmd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

No definition available.

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