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Subsequent Events (Details) (USD $)
8 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 10 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Feb. 24, 2015
sqft
Jan. 06, 2015
Mar. 13, 2015
Mar. 13, 2015
Mar. 05, 2015
life
member
Subsequent Event [Line Items]              
Authorized share amount for repurchase $ 10,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount            
Shares repurchased, value   5,612,000us-gaap_TreasuryStockValueAcquiredCostMethod          
Subsequent Event              
Subsequent Event [Line Items]              
Authorized share amount for repurchase       20,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Shares repurchased, value         12,300,000us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
17,800,000us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Area of property leased     26,000mdxg_LesseeLeasingArrangementsOperatingLeasesAreaofPropertyLeased
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
       
Term of lease     63 months        
Base rental payments     $ 1,600,000us-gaap_OperatingLeasesRentExpenseMinimumRentals
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
       
Anthem | Subsequent Event              
Subsequent Event [Line Items]              
Number of members             34,000,000mdxg_PrivateInsuranceCoverageNumberofMembers
/ dei_LegalEntityAxis
= mdxg_AnthemMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Number of covered lives             149,000,000mdxg_PrivateInsuranceCoverageNumberofCoveredLives
/ dei_LegalEntityAxis
= mdxg_AnthemMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Percent of covered lives             60.00%mdxg_PrivateInsuranceCoveragePercentofCoveredLives
/ dei_LegalEntityAxis
= mdxg_AnthemMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember