Concentrations (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Customer A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	23.00%
Revenues	$ 3,026,072
Customer B [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%
Revenues	$ 2,297,573
Custtomer C [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		16.00%
Revenues		$ 2,096,121
Customer D [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		15.00%
Revenues		$ 1,952,652
Suppliers A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	54.00%	43.00%
Purchase	$ 3,357,250	$ 3,651,430
Suppliers B [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	26.00%
Purchase	$ 1,649,276
Suppliers C [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Purchase	$ 616,587
Supplier D [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		10.00%
Purchase		$ 840,657

Concentration risk, percentage.

No definition available.

Name:	mhdg_ConcentrationRiskPercentage2
Namespace Prefix:	mhdg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Payments of cash to suppliers for goods and services during the current period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585

+ Details

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

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

+ Details

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

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_CustomerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_CustomerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_CustomerTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_CustomerThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_SuppliersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_SuppliersOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_SuppliersTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mhdg_SuppliersThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: