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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cash flows from operating activities:      
Net income (loss) $ 6,220us-gaap_NetIncomeLoss $ (4,112)us-gaap_NetIncomeLoss $ (7,663)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash from operating activities:      
Depreciation 1,197us-gaap_Depreciation 637us-gaap_Depreciation 465us-gaap_Depreciation
Loss on fixed asset disposal 0us-gaap_GainLossOnDispositionOfAssets 37us-gaap_GainLossOnDispositionOfAssets 0us-gaap_GainLossOnDispositionOfAssets
Amortization of intangible assets 928us-gaap_AmortizationOfIntangibleAssets 1,054us-gaap_AmortizationOfIntangibleAssets 1,380us-gaap_AmortizationOfIntangibleAssets
Impairment of intangible assets 0mdxg_ImpairmentofIntangibleAssets 368mdxg_ImpairmentofIntangibleAssets 1,798mdxg_ImpairmentofIntangibleAssets
Amortization of debt discount and deferred financing costs 0us-gaap_AmortizationOfFinancingCostsAndDiscounts 1,328us-gaap_AmortizationOfFinancingCostsAndDiscounts 1,714us-gaap_AmortizationOfFinancingCostsAndDiscounts
Share-based compensation 11,453us-gaap_ShareBasedCompensation 6,010us-gaap_ShareBasedCompensation 2,539us-gaap_ShareBasedCompensation
Change in fair value of earn-out liability 0mdxg_FairValueAdjustmentofEarnOutLiability 0mdxg_FairValueAdjustmentofEarnOutLiability 1,567mdxg_FairValueAdjustmentofEarnOutLiability
Increase (decrease) in cash resulting from changes in:      
Accounts receivable (10,579)us-gaap_IncreaseDecreaseInAccountsReceivable (8,439)us-gaap_IncreaseDecreaseInAccountsReceivable (5,762)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventory (1,252)us-gaap_IncreaseDecreaseInInventories (858)us-gaap_IncreaseDecreaseInInventories (2,310)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets (203)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (707)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (466)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Other assets 0us-gaap_IncreaseDecreaseInOtherOperatingAssets 70us-gaap_IncreaseDecreaseInOtherOperatingAssets 97us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable 1,287us-gaap_IncreaseDecreaseInAccountsPayable 1,209us-gaap_IncreaseDecreaseInAccountsPayable (81)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued compensation 5,935us-gaap_IncreaseDecreaseInDeferredCompensation 2,836us-gaap_IncreaseDecreaseInDeferredCompensation 2,355us-gaap_IncreaseDecreaseInDeferredCompensation
Accrued expenses 1,098us-gaap_IncreaseDecreaseInAccruedLiabilities 353us-gaap_IncreaseDecreaseInAccruedLiabilities 606us-gaap_IncreaseDecreaseInAccruedLiabilities
Accrued interest 0us-gaap_IncreaseDecreaseInInterestPayableNet (42)us-gaap_IncreaseDecreaseInInterestPayableNet 388us-gaap_IncreaseDecreaseInInterestPayableNet
Other liabilities 718us-gaap_IncreaseDecreaseInOtherOperatingLiabilities (28)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities 41us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash flows from operating activities 16,802us-gaap_NetCashProvidedByUsedInOperatingActivities (284)us-gaap_NetCashProvidedByUsedInOperatingActivities (3,332)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:      
Purchases of equipment (2,558)us-gaap_PaymentsToAcquireMachineryAndEquipment (2,337)us-gaap_PaymentsToAcquireMachineryAndEquipment (637)us-gaap_PaymentsToAcquireMachineryAndEquipment
Purchases of fixed maturity securities (9,000)us-gaap_PaymentsToAcquireMarketableSecurities 0us-gaap_PaymentsToAcquireMarketableSecurities 0us-gaap_PaymentsToAcquireMarketableSecurities
Patent application costs (594)mdxg_PaymentsforApplicationCostsPatent (689)mdxg_PaymentsforApplicationCostsPatent 0mdxg_PaymentsforApplicationCostsPatent
Net cash flows from investing activities (12,152)us-gaap_NetCashProvidedByUsedInInvestingActivities (3,026)us-gaap_NetCashProvidedByUsedInInvestingActivities (637)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:      
Proceeds from exercise of stock options 2,470us-gaap_ProceedsFromStockOptionsExercised 1,981us-gaap_ProceedsFromStockOptionsExercised 1,053us-gaap_ProceedsFromStockOptionsExercised
Proceeds from exercise of warrants 1,113us-gaap_ProceedsFromWarrantExercises 2,108us-gaap_ProceedsFromWarrantExercises 6,001us-gaap_ProceedsFromWarrantExercises
Proceeds from public offering, net of expenses 0us-gaap_ProceedsFromIssuanceOrSaleOfEquity 36,602us-gaap_ProceedsFromIssuanceOrSaleOfEquity 0us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Stock repurchase (5,612)us-gaap_ProceedsFromRepurchaseOfEquity 0us-gaap_ProceedsFromRepurchaseOfEquity 0us-gaap_ProceedsFromRepurchaseOfEquity
Repayment of convertible debt related to acquisition 0us-gaap_RepaymentsOfConvertibleDebt 0us-gaap_RepaymentsOfConvertibleDebt (427)us-gaap_RepaymentsOfConvertibleDebt
Principal payments of equipment leases (117)us-gaap_PaymentsToAcquireEquipmentOnLease (57)us-gaap_PaymentsToAcquireEquipmentOnLease (16)us-gaap_PaymentsToAcquireEquipmentOnLease
Repurchase of warrants 0us-gaap_PaymentsForRepurchaseOfWarrants 0us-gaap_PaymentsForRepurchaseOfWarrants (1)us-gaap_PaymentsForRepurchaseOfWarrants
Net cash flows from financing activities (2,146)us-gaap_NetCashProvidedByUsedInFinancingActivities 40,634us-gaap_NetCashProvidedByUsedInFinancingActivities 6,610us-gaap_NetCashProvidedByUsedInFinancingActivities
Net change in cash 2,504us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 37,324us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 2,641us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period 44,078us-gaap_CashAndCashEquivalentsAtCarryingValue 6,754us-gaap_CashAndCashEquivalentsAtCarryingValue 4,113us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period $ 46,582us-gaap_CashAndCashEquivalentsAtCarryingValue $ 44,078us-gaap_CashAndCashEquivalentsAtCarryingValue $ 6,754us-gaap_CashAndCashEquivalentsAtCarryingValue