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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
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Data Type:	xbrli:durationItemType
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The amount of accumulated depreciation, by major property class, recorded on property subject to or available for lease as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=77907726&loc=d3e41460-112716

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718

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Data Type:	xbrli:monetaryItemType
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Amount before accumulated depreciation of physical assets used in the normal conduct of business to produce goods and services subject to or available for lease.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=77907726&loc=d3e41457-112716

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Data Type:	xbrli:monetaryItemType
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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.

No definition available.

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The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=us-gaap_ContainersMember
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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=mini_SteelGroundLevelOfficesMember
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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=us-gaap_PropertyPlantAndEquipmentOtherTypesMember
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Name:	us-gaap_MajorPropertyClassAxis=mini_TankAndPumpSolutionsMember
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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=mini_SteelTanksMember
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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=mini_RollOffBoxesMember
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Name:	srt_RangeAxis=srt_MinimumMember
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Name:	srt_RangeAxis=srt_MaximumMember
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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=mini_StainlessSteelTankTrailersMember
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Data Type:	na
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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=mini_VacuumBoxesMember
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Data Type:	na
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Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=mini_DewateringBoxesMember
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