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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net (loss) income $ (6,592,000)us-gaap_NetIncomeLoss $ 1,652,000us-gaap_NetIncomeLoss
Adjustments to reconcile net (loss) income to net cash used in operating activities:    
Depreciation and amortization 11,223,000us-gaap_Depreciation 10,177,000us-gaap_Depreciation
Noncash compensation 531,000us-gaap_ShareBasedCompensation 298,000us-gaap_ShareBasedCompensation
Deferred income tax (benefit) expense (3,418,000)us-gaap_DeferredIncomeTaxExpenseBenefit 573,000us-gaap_DeferredIncomeTaxExpenseBenefit
Other (39,000)us-gaap_OtherNoncashIncomeExpense 99,000us-gaap_OtherNoncashIncomeExpense
Change in current assets and liabilities:    
(Increase) decrease in accounts receivable (6,211,000)us-gaap_IncreaseDecreaseInAccountsReceivable 5,659,000us-gaap_IncreaseDecreaseInAccountsReceivable
Increase in prepaid expenses and other assets (819,000)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (60,000)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Increase in accounts payable 2,259,000us-gaap_IncreaseDecreaseInAccountsPayable 1,290,000us-gaap_IncreaseDecreaseInAccountsPayable
Decrease in accrued liabilities (192,000)us-gaap_IncreaseDecreaseInAccruedLiabilities (439,000)us-gaap_IncreaseDecreaseInAccruedLiabilities
(Decrease) increase in deferred revenue (4,000)us-gaap_IncreaseDecreaseInDeferredRevenue 4,101,000us-gaap_IncreaseDecreaseInDeferredRevenue
Net cash (used in) provided by operating activities (3,262,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 23,350,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES:    
Cash acquired from merger 12,382,000us-gaap_CashAcquiredFromAcquisition  
Capital expenditures, net of increase in accrued purchases of property and equipment summarized below (1,189,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (6,370,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from maturity of short-term investments 6,750,000us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments 8,250,000us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments
Acquisition of short-term investments (5,500,000)us-gaap_PaymentsToAcquireOtherInvestments (6,750,000)us-gaap_PaymentsToAcquireOtherInvestments
Proceeds from disposal of assets 603,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment 163,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Net cash provide by (used in) investing activities 13,046,000us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (4,707,000)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES:    
Excess tax benefit from share based compensation (340,000)us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities  
Tax withholdings related to stock based compensation awards (120,000)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation  
Principal payments on notes payable (2,847,000)us-gaap_RepaymentsOfBankDebt (3,135,000)us-gaap_RepaymentsOfBankDebt
Principal payments on capital lease obligations (378,000)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations (227,000)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
Dividends paid   (645,000)us-gaap_PaymentsOfDividends
Net cash used in financing activities (3,685,000)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (4,007,000)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of exchange rate changes in cash and cash equivalents (101,000)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents (170,000)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase in cash and cash equivalents 5,998,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 14,466,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 14,644,000us-gaap_CashAndCashEquivalentsAtCarryingValue 11,860,000us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS AT END OF PERIOD 20,642,000us-gaap_CashAndCashEquivalentsAtCarryingValue 26,326,000us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL CASH FLOW INFORMATION:    
Cash paid for interest 152,000us-gaap_InterestPaid 168,000us-gaap_InterestPaid
Cash paid for income taxes 215,000us-gaap_IncomeTaxesPaid 110,000us-gaap_IncomeTaxesPaid
Cash received for income taxes 520,000us-gaap_ProceedsFromIncomeTaxRefunds  
NONCASH INVESTING AND FINANCING ACTIVITIES:    
Increase in accrued purchases of property and equipment 19,000us-gaap_CapitalExpendituresIncurredButNotYetPaid 1,387,000us-gaap_CapitalExpendituresIncurredButNotYetPaid
Capital lease obligations incurred 126,000us-gaap_CapitalLeaseObligationsIncurred 485,000us-gaap_CapitalLeaseObligationsIncurred
Stock consideration to consummate the merger $ 42,902,000us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1