No definition available.

Name:	mhtx_WeightedAverageExercisePriceExercisable
Namespace Prefix:	mhtx_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

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CAPITAL TRANSACTIONS (Details 1) - $ / shares	6 Months Ended
CAPITAL TRANSACTIONS (Details 1) - $ / shares	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Number of Options, Outstanding Beginning Balance	26,500,000	26,500,000	26,500,000	26,500,000
Exercise Price 0.05 [Member]
Number of Options, Outstanding Beginning Balance	3,000,000
Weighted Average Remaining Contractual Life	3 years
Weighted Average Exercise Price	$ 0.05
Number of Options Exercisable, Outstanding Beginning Balance	3,000,000
Weighted Average Exercise Price, exercisable	$ 0.05
Exercise Price 0.06 [Member]
Number of Options, Outstanding Beginning Balance	5,000,000
Weighted Average Remaining Contractual Life	3 years 1 month 6 days
Weighted Average Exercise Price	$ 0.06
Number of Options Exercisable, Outstanding Beginning Balance	5,000,000
Weighted Average Exercise Price, exercisable	$ 0.06
Exercise Price 0.14 [Member]
Number of Options, Outstanding Beginning Balance	3,000,000
Weighted Average Remaining Contractual Life	2 years
Weighted Average Exercise Price	$ 0.14
Number of Options Exercisable, Outstanding Beginning Balance	3,000,000
Weighted Average Exercise Price, exercisable	$ 0.14
Exercise Price 0.02 [Member]
Number of Options, Outstanding Beginning Balance	15,500,000
Weighted Average Remaining Contractual Life	8 years 21 days
Weighted Average Exercise Price	$ 0.02
Number of Options Exercisable, Outstanding Beginning Balance	15,500,000
Weighted Average Exercise Price, exercisable	$ 0.02