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Consolidated Statements of Cash Flows (USD $)
 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Cash flows from operating activities:    
Net income (loss) $ 4,439,000us-gaap_NetIncomeLoss $ (3,879,000)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization expense 10,446,000us-gaap_DepreciationDepletionAndAmortization 11,892,000us-gaap_DepreciationDepletionAndAmortization
Stock-based compensation expense 6,765,000us-gaap_ShareBasedCompensation 7,466,000us-gaap_ShareBasedCompensation
Benefit for deferred income taxes (817,000)us-gaap_DeferredIncomeTaxExpenseBenefit (5,177,000)us-gaap_DeferredIncomeTaxExpenseBenefit
Goodwill, Impairment Loss 2,283,000us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss
Excess tax benefit from stock-based compensation (834,000)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities (16,000)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax 892,000us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax 0us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax
Other non-cash items (234,000)us-gaap_OtherNoncashIncomeExpense (740,000)us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities:    
Accounts receivable, unbilled receivable, and cost in excess of billings (8,373,000)us-gaap_IncreaseDecreaseInAccountsReceivable (3,807,000)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventory (969,000)us-gaap_IncreaseDecreaseInInventories 2,144,000us-gaap_IncreaseDecreaseInInventories
Prepaid income taxes (2,499,000)us-gaap_IncreaseDecreaseInPrepaidTaxes (744,000)us-gaap_IncreaseDecreaseInPrepaidTaxes
Prepaid expenses and other current assets 49,000us-gaap_IncreaseDecreaseInPrepaidExpense 2,801,000us-gaap_IncreaseDecreaseInPrepaidExpense
Other non-current assets 428,000us-gaap_IncreaseDecreaseInOtherNoncurrentAssets 840,000us-gaap_IncreaseDecreaseInOtherNoncurrentAssets
Accounts payable and accrued expenses 7,019,000us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 2,646,000us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Deferred revenues and customer advances 1,853,000us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits (1,287,000)us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits
Income taxes payable (898,000)us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable (109,000)us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Other non-current liabilities (30,000)us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities (298,000)us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities
Net cash provided by operating activities 19,520,000us-gaap_NetCashProvidedByUsedInOperatingActivities 11,732,000us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:    
Purchases of property and equipment (3,467,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (5,067,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Increase in other investing activities 1,000us-gaap_PaymentsForProceedsFromOtherInvestingActivities (300,000)us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Proceeds from Divestiture of Businesses 885,000us-gaap_ProceedsFromDivestitureOfBusinesses 0us-gaap_ProceedsFromDivestitureOfBusinesses
Net cash used in investing activities (2,581,000)us-gaap_NetCashProvidedByUsedInInvestingActivities (5,367,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:    
Proceeds from employee stock plans 2,048,000us-gaap_ProceedsFromStockOptionsExercised 872,000us-gaap_ProceedsFromStockOptionsExercised
Excess tax benefits from stock-based compensation 834,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 16,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Payments of capital lease obligations (481,000)us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations (564,000)us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations
Net cash provided by financing activities 2,401,000us-gaap_NetCashProvidedByUsedInFinancingActivities 324,000us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rate changes on cash and cash equivalents (107,000)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents (105,000)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase in cash and cash equivalents 19,233,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 6,584,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period 47,287,000us-gaap_CashAndCashEquivalentsAtCarryingValue 39,126,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period 66,520,000us-gaap_CashAndCashEquivalentsAtCarryingValue 45,710,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash paid (received) during the period for:    
Interest 23,000us-gaap_InterestPaid 38,000us-gaap_InterestPaid
Income taxes 5,749,000us-gaap_IncomeTaxesPaidNet 4,733,000us-gaap_IncomeTaxesPaidNet
Supplemental disclosures-non-cash activities:    
Issuance of restricted stock awards to employees 9,514,000us-gaap_StockIssued1 8,313,000us-gaap_StockIssued1
Capital lease financings $ 0us-gaap_CapitalLeaseObligationsIncurred $ 494,000us-gaap_CapitalLeaseObligationsIncurred