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Accounts Receivable and Net Revenue - Schedule of Net Patient Service Revenue by Type of Payor (Detail) | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Health Care Organization, Receivable and Revenue Disclosures [Line Items] |  |
Percentage of net patient service revenue | 100.00% | 100.00%
Contracted Managed Care [Member] |  |
Health Care Organization, Receivable and Revenue Disclosures [Line Items] |  |
Percentage of net patient service revenue | 70.00% | 67.00%
Government [Member] |  |
Health Care Organization, Receivable and Revenue Disclosures [Line Items] |  |
Percentage of net patient service revenue | 25.00% | 26.00%
Other Third-Parties [Member] |  |
Health Care Organization, Receivable and Revenue Disclosures [Line Items] |  |
Percentage of net patient service revenue | 3.00% | 6.00%
Private-Pay Patients [Member] |  |
Health Care Organization, Receivable and Revenue Disclosures [Line Items] |  |
Percentage of net patient service revenue | 2.00% | 1.00%

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- Definition Percentage of net patient service revenue by type payor. + References No definition available. + Details
Name: | md_PercentageOfNetPatientServiceRevenueByTypeOfPayor
Namespace Prefix: | md_
Data Type: | dtr-types:percentItemType
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
Name: | us-gaap_HealthCareOrganizationReceivableAndRevenueDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_HealthCareOrganizationRevenueSourcesAxis=md_ContractedManagedCareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_HealthCareOrganizationRevenueSourcesAxis=us-gaap_GovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_HealthCareOrganizationRevenueSourcesAxis=us-gaap_ThirdPartyPayorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_HealthCareOrganizationRevenueSourcesAxis=us-gaap_SelfPayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |