v3.26.1

Description of Business - Additional Information (Detail)	Mar. 31, 2026
Accounting Policies [Abstract]
Number of current operations	13
Percent of greenhouse gas reduction requirement	60.00%

X

- Definition

Number of current operations

+ References

No definition available.

+ Details

Name:	mntk_NumberOfCurrentOperations
Namespace Prefix:	mntk_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percent of greenhouse gas reduction requirement.

+ References

No definition available.

+ Details

Name:	mntk_PercentOfGreenhouseGasReductionRequirement
Namespace Prefix:	mntk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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