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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 $ 1,132us-gaap_NetIncomeLoss $ 2,033us-gaap_NetIncomeLoss $ 65us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization of property and equipment 5,345us-gaap_DepreciationAndAmortization 4,189us-gaap_DepreciationAndAmortization 3,636us-gaap_DepreciationAndAmortization
Amortization of intangibles 295us-gaap_AmortizationOfIntangibleAssets 223us-gaap_AmortizationOfIntangibleAssets 182us-gaap_AmortizationOfIntangibleAssets
Amortization of debt issue costs 66us-gaap_AmortizationOfFinancingCosts 49us-gaap_AmortizationOfFinancingCosts 38us-gaap_AmortizationOfFinancingCosts
Stock based compensation - options and restricted stock 641us-gaap_ShareBasedCompensation 666us-gaap_ShareBasedCompensation 645us-gaap_ShareBasedCompensation
Stock based compensation - warrants 51neo_StockBasedCompensationWarrantExpense 263neo_StockBasedCompensationWarrantExpense 153neo_StockBasedCompensationWarrantExpense
Provision for bad debts 2,437us-gaap_ProvisionForDoubtfulAccounts 2,797us-gaap_ProvisionForDoubtfulAccounts 3,053us-gaap_ProvisionForDoubtfulAccounts
Changes in assets and liabilities, net:      
(Increase) in accounts receivable, net of write-offs (2,770)us-gaap_IncreaseDecreaseInAccountsReceivable (7,416)us-gaap_IncreaseDecreaseInAccountsReceivable (9,192)us-gaap_IncreaseDecreaseInAccountsReceivable
(Increase) in inventories (229)us-gaap_IncreaseDecreaseInInventories (442)us-gaap_IncreaseDecreaseInInventories (657)us-gaap_IncreaseDecreaseInInventories
Decrease (increase) in other assets 41us-gaap_IncreaseDecreaseInOtherNoncurrentAssets (71)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets 46us-gaap_IncreaseDecreaseInOtherNoncurrentAssets
(Increase) decrease in other current assets (25)us-gaap_IncreaseDecreaseInOtherCurrentAssets (932)us-gaap_IncreaseDecreaseInOtherCurrentAssets 96us-gaap_IncreaseDecreaseInOtherCurrentAssets
Increase in accounts payable and other liabilities 2,466us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities 868us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities 1,443us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES 9,450us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 2,227us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (492)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES      
Purchases of intangible assets     (1,037)us-gaap_PaymentsToAcquireIntangibleAssets
Acquisition, net of cash acquired (5,830)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired    
Purchases of property and equipment (3,772)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (2,011)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (2,615)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
NET CASH USED IN INVESTING ACTIVITIES (9,602)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (2,011)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (3,652)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES      
(Repayments to) advances from revolving credit facility (4,282)us-gaap_ProceedsFromRepaymentsOfLinesOfCredit (4,177)us-gaap_ProceedsFromRepaymentsOfLinesOfCredit 4,560us-gaap_ProceedsFromRepaymentsOfLinesOfCredit
Restricted cash     500us-gaap_ProceedsFromRepaymentsOfRestrictedCashFinancingActivities
Repayment of capital lease obligations (3,581)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities (2,606)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities (2,187)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Issuance of common stock for the exercise of options, warrants and ESPP shares 2,616us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions 515us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions 511us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
Issuance of common stock for cash , net of transaction expenses 34,254us-gaap_ProceedsFromIssuanceOfCommonStock 9,018us-gaap_ProceedsFromIssuanceOfCommonStock  
NET CASH PROVIDED BY FINANCING ACTIVITIES 29,007us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 2,750us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 3,384us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
NET CHANGE IN CASH AND CASH EQUIVALENTS 28,855us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 2,966us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (760)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR 4,834us-gaap_CashAndCashEquivalentsAtCarryingValue 1,868us-gaap_CashAndCashEquivalentsAtCarryingValue 2,628us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS, END OF YEAR 33,689us-gaap_CashAndCashEquivalentsAtCarryingValue 4,834us-gaap_CashAndCashEquivalentsAtCarryingValue 1,868us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION      
Interest paid 981us-gaap_InterestPaid 945us-gaap_InterestPaid 1,108us-gaap_InterestPaid
Income taxes paid 177us-gaap_IncomeTaxesPaid 17us-gaap_IncomeTaxesPaid  
Equipment leased under capital lease obligations 5,884us-gaap_CapitalLeaseObligationsIncurred 3,377us-gaap_CapitalLeaseObligationsIncurred 2,782us-gaap_CapitalLeaseObligationsIncurred
Common stock issued for intangible asset purchase     $ 1,945us-gaap_NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1