Commitments and License Rights - Additional Information (Details)	Dec. 31, 2020 USD ($)
Commitments and License Rights
Commitments To Complete Contracts In Process Value	$ 2,049,000

Represents the value of commitments in performing under a construction-type contract which are outside the ordinary course of business at the balance sheet date.

No definition available.

Name:	mcs_CommitmentsToCompleteContractsInProcessValue
Namespace Prefix:	mcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant