Date when an entity was incorporated

No definition available.

Name:	dei_EntityIncorporationDateOfIncorporation
Namespace Prefix:	dei_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash consideration.

+ References

No definition available.

+ Details

Name:	maas_CashConsiderations
Namespace Prefix:	maas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Equity interest percentage.

+ References

No definition available.

+ Details

Name:	maas_EquityInterestPercentages
Namespace Prefix:	maas_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Equity interest subscribed percentage.

+ References

No definition available.

+ Details

Name:	maas_EquityInterestSubscribedPercentage
Namespace Prefix:	maas_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of beneficial ownership.

+ References

No definition available.

+ Details

Name:	maas_PercentageOfBeneficialOwnership
Namespace Prefix:	maas_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represent the amount of percentage of equity interest repurchases.

+ References

No definition available.

+ Details

Name:	maas_PercentageOfEquityInterestRepurchases
Namespace Prefix:	maas_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of voting interest.

+ References

No definition available.

+ Details

Name:	maas_VotingInterestPercentage
Namespace Prefix:	maas_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The voting power percentage.

+ References

No definition available.

+ Details

Name:	maas_VotingPowerPercentage
Namespace Prefix:	maas_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

- References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478671/942-235-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1

+ Details

Name:	srt_DistributionOfAssetsLiabilitiesAndStockholdersEquityLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of equity interest issued or issuable by acquirer as part of consideration transferred in business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-41

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-2

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-42

+ Details

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interest acquired in business combination.

+ References

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 23
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-23

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (c)(2)
-SubTopic 10
-Topic 810
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A

+ Details

Name:	us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 4.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-4

+ Details

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

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=maas_AIXMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=maas_AIFUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=maas_SecuritiesExchangeAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=maas_RealProspectLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=maas_CarveGroupLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=maas_GlykenHoldsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=maas_BGMGroupLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=maas_ConsiderationSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=maas_AIFUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=maas_PuyiFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=maas_FanhuaPuyiFundSalesCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=maas_GuangdongMeidiyaInvestmentCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=maas_PuyiGroupLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=maas_GuangxiYanwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=maas_GlykenBirdNestTechnologyShenzhenCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Organization and Description of Business (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands														1 Months Ended			6 Months Ended
	Jul. 28, 2025 $ / shares shares	Jul. 18, 2025 CNY (¥) shares	Jul. 18, 2025 USD ($) $ / shares shares	Jun. 30, 2025 shares	Jun. 23, 2025 shares	Jun. 03, 2025 shares	May 21, 2025 shares	Dec. 27, 2024 USD ($) shares	Nov. 19, 2024	Oct. 31, 2024 shares	Dec. 27, 2023 shares	Dec. 22, 2023 CNY (¥)	Sep. 01, 2018	Dec. 31, 2025 $ / shares shares	Sep. 30, 2025 CNY (¥)	Jan. 31, 2025 CNY (¥)	Dec. 31, 2025 $ / shares shares	Dec. 31, 2023
Organization and Description of Business [Line Items]
Incorporation date																	Mar. 29, 2019
Percentage of equity interest repurchases												4.46%
Shares issued (in Shares)				44,810		5,000,000,000				5,000,000,000
Purchase price (in Dollars per share) \| $ / shares	$ 1.5
Reverse stock split									1-for-90
Equity interest percentage											76.67%
Voting interest											50.00%
Consideration amount (in Dollars)		¥ 149,222	$ 20,790
Cash consideration (in Yuan Renminbi) \| ¥															¥ 70,000	¥ 30,240
Equity interest subscribed percentage																	10.00%
AIX [Member]
Organization and Description of Business [Line Items]
Equity interests owned													4.46%
Shares issued (in Shares)											568,226,628
AIFU [Member]
Organization and Description of Business [Line Items]
Percentage of equity interests																		50.10%
Securities Exchange Agreement [Member]
Organization and Description of Business [Line Items]
Shares issued (in Shares)											284,113,315
Securities Exchange Agreement [Member] \| AIFU [Member]
Organization and Description of Business [Line Items]
Percentage of equity interests																		76.67%
Real Prospect Limited [Member]
Organization and Description of Business [Line Items]
Percentage of equity interest			100.00%											100.00%			100.00%
Aggregate consideration (in Shares)		98,002,174	98,002,174
Carve Group Ltd [Member]
Organization and Description of Business [Line Items]
Percentage of equity interest	100.00%
Aggregate consideration (in Shares)	195,894,609
Glyken Holds [Member]
Organization and Description of Business [Line Items]
Percentage of equity interest														90.00%			90.00%
Class A Ordinary Shares [Member]
Organization and Description of Business [Line Items]
Shares issued (in Shares)		10,000,000	10,000,000	9,295,383		4,000,000,000				4,000,000,000
Shares consideration (in Shares)								69,995,661
Class A Ordinary Shares [Member] \| Securities Exchange Agreement [Member]
Organization and Description of Business [Line Items]
Shares issued (in Shares)					3,156,814		1,420,567
Purchase price (in Dollars per share) \| $ / shares														$ 0.09			$ 0.09
Reverse stock split					1-for-90		1-for-400
Class A Ordinary Shares [Member] \| Real Prospect Limited [Member]
Organization and Description of Business [Line Items]
Aggregate consideration (in Shares)																	98,002,174
Class A Ordinary Shares [Member] \| Carve Group Ltd [Member]
Organization and Description of Business [Line Items]
Aggregate consideration (in Shares)	195,894,609
Class A Ordinary Shares [Member] \| BGM Group Ltd [Member]
Organization and Description of Business [Line Items]
Consideration amount (in Dollars) \| $								$ 140,000
Consideration Shares [Member]
Organization and Description of Business [Line Items]
Purchase price (in Dollars per share) \| $ / shares			$ 1.5
Class B Ordinary Shares [Member]
Organization and Description of Business [Line Items]
Shares issued (in Shares)						1,000,000,000				1,000,000,000				5,000,000
AIFU [Member]
Organization and Description of Business [Line Items]
Equity interest percentage												15.41%
Equity interest percentage																100.00%
Percentage of beneficial ownership														7.85%			7.85%
AIFU [Member] \| Class A Ordinary Shares [Member]
Organization and Description of Business [Line Items]
Aggregate voting power percentage														16.75%			16.75%
Puyi Fund [Member]
Organization and Description of Business [Line Items]
Equity interest percentage												4.46%
Fanhua Puyi Fund Sales Co., Ltd. [Member]
Organization and Description of Business [Line Items]
Equity interest percentage														15.41%			15.41%
Equity interest (in Yuan Renminbi) \| ¥												¥ 10,463
Guangdong Meidiya Investment Co., Ltd [Member]
Organization and Description of Business [Line Items]
Equity interest percentage																44.70%
Puyi Group Limited [Member]
Organization and Description of Business [Line Items]
Equity interest percentage															100.00%
Guangxi Yanwo [Member]
Organization and Description of Business [Line Items]
Equity interest percentage														10.00%			10.00%
Glyken Bird Nest Technology (Shenzhen) Co., Ltd [Member]
Organization and Description of Business [Line Items]
Equity interest percentage														100.00%			100.00%