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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Dec. 31, 2014
Jun. 30, 2014
Current assets:    
Cash and cash equivalents $ 25,121,000us-gaap_CashAndCashEquivalentsAtCarryingValue $ 28,074,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts receivable, net of allowance for doubtful accounts of $55 at December 31, 2014 and $78 at June 30, 2014 11,315,000us-gaap_AccountsReceivableNetCurrent 11,355,000us-gaap_AccountsReceivableNetCurrent
Inventories 2,335,000us-gaap_InventoryNet 3,272,000us-gaap_InventoryNet
Deferred income taxes - current, net 1,350,000us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent 1,458,000us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent
Prepaid expenses and other current assets 983,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent 804,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Total current assets 41,104,000us-gaap_AssetsCurrent 44,963,000us-gaap_AssetsCurrent
Property, plant and equipment, net 2,367,000us-gaap_PropertyPlantAndEquipmentNet 2,168,000us-gaap_PropertyPlantAndEquipmentNet
Intangible assets, net 396,000us-gaap_FiniteLivedIntangibleAssetsNet 476,000us-gaap_FiniteLivedIntangibleAssetsNet
Deferred income taxes, net 13,287,000us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent 13,231,000us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent
Other long-term assets 1,539,000us-gaap_OtherAssetsNoncurrent 1,548,000us-gaap_OtherAssetsNoncurrent
Total assets 58,693,000us-gaap_Assets 62,386,000us-gaap_Assets
Current liabilities:    
Accounts payable and accrued expenses 5,994,000us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent 7,591,000us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Deferred revenue 7,037,000us-gaap_DeferredRevenueCurrent 7,441,000us-gaap_DeferredRevenueCurrent
Total current liabilities 13,031,000us-gaap_LiabilitiesCurrent 15,032,000us-gaap_LiabilitiesCurrent
Long-term liabilities:    
Deferred revenue 2,195,000us-gaap_DeferredRevenueNoncurrent 1,400,000us-gaap_DeferredRevenueNoncurrent
Pension liability 3,200,000us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent 3,566,000us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent
Other 1,681,000us-gaap_OtherLiabilitiesNoncurrent 1,934,000us-gaap_OtherLiabilitiesNoncurrent
Total liabilities 20,107,000us-gaap_Liabilities 21,932,000us-gaap_Liabilities
Commitments and contingencies (Note XX)      
Stockholders' equity:    
Shares of common stock, par value $.01; 14,000,000 authorized; 9,134,043 and 8,996,655 issued and outstanding at December 31, 2014 and June 30, 2014 91,000us-gaap_CommonStockValue 90,000us-gaap_CommonStockValue
Capital in excess of par value 210,121,000us-gaap_AdditionalPaidInCapitalCommonStock 209,711,000us-gaap_AdditionalPaidInCapitalCommonStock
Accumulated deficit (171,401,000)us-gaap_RetainedEarningsAccumulatedDeficit (169,001,000)us-gaap_RetainedEarningsAccumulatedDeficit
Treasury stock, at cost; 37,788 shares (255,000)us-gaap_TreasuryStockValue (255,000)us-gaap_TreasuryStockValue
Accumulated other comprehensive income 30,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (91,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Total stockholders' equity 38,586,000us-gaap_StockholdersEquity 40,454,000us-gaap_StockholdersEquity
Total liabilities and stockholders' equity 58,693,000us-gaap_LiabilitiesAndStockholdersEquity 62,386,000us-gaap_LiabilitiesAndStockholdersEquity
Series Preferred Stock [Member]    
Stockholders' equity:    
Shares of preferred stock 0us-gaap_PreferredStockValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		 0us-gaap_PreferredStockValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
Preferred Class A [Member]    
Stockholders' equity:    
Shares of preferred stock $ 0us-gaap_PreferredStockValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_PreferredClassAMember		 $ 0us-gaap_PreferredStockValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_PreferredClassAMember