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Summary of Significant Accounting Policies (Summary of Estimated Useful Lives Of Assets) (Detail) | 12 Months Ended
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Dec. 31, 2016
Building and Building Improvements [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 10 years
Building and Building Improvements [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 35 years
Equipment and Fixtures [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 3 years
Equipment and Fixtures [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 15 years
Leasehold Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Property plant and equipment leasehold improvements useful life | Lease term
Vehicles [Member] |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life | 5 years

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- Definition Property plant and equipment leasehold improvements useful life. + References No definition available. + Details
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Namespace Prefix: | med_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Details
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- Details
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- Details
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- Details
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- Details
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Data Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |