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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 2,792us-gaap_SalesRevenueNet	$ 2,640us-gaap_SalesRevenueNet	$ 5,387us-gaap_SalesRevenueNet	$ 5,194us-gaap_SalesRevenueNet
Cost of sales	2,096us-gaap_CostOfRevenue	2,091us-gaap_CostOfRevenue	3,863us-gaap_CostOfRevenue	3,700us-gaap_CostOfRevenue
Gross profit	696us-gaap_GrossProfit	549us-gaap_GrossProfit	1,524us-gaap_GrossProfit	1,494us-gaap_GrossProfit
Operating expenses:
Selling expenses	186us-gaap_SellingExpense	139us-gaap_SellingExpense	328us-gaap_SellingExpense	231us-gaap_SellingExpense
General and administrative expenses	459us-gaap_GeneralAndAdministrativeExpense	422us-gaap_GeneralAndAdministrativeExpense	950us-gaap_GeneralAndAdministrativeExpense	878us-gaap_GeneralAndAdministrativeExpense
Research and development costs	444us-gaap_ResearchAndDevelopmentExpense	364us-gaap_ResearchAndDevelopmentExpense	829us-gaap_ResearchAndDevelopmentExpense	740us-gaap_ResearchAndDevelopmentExpense
Total operating expenses	1,089us-gaap_OperatingExpenses	925us-gaap_OperatingExpenses	2,107us-gaap_OperatingExpenses	1,849us-gaap_OperatingExpenses
Operating loss	(393)us-gaap_OperatingIncomeLoss	(376)us-gaap_OperatingIncomeLoss	(583)us-gaap_OperatingIncomeLoss	(355)us-gaap_OperatingIncomeLoss
Interest expense	(2)us-gaap_InterestExpense	(2)us-gaap_InterestExpense	(3)us-gaap_InterestExpense	(4)us-gaap_InterestExpense
Interest income	4us-gaap_OtherNonoperatingIncome	10us-gaap_OtherNonoperatingIncome	5us-gaap_OtherNonoperatingIncome	10us-gaap_OtherNonoperatingIncome
Gain (loss) from disposal of equipment	1us-gaap_GainLossOnDispositionOfAssets1	(6)us-gaap_GainLossOnDispositionOfAssets1	1us-gaap_GainLossOnDispositionOfAssets1	(6)us-gaap_GainLossOnDispositionOfAssets1
Realized gain on sale of investments	59us-gaap_MarketableSecuritiesRealizedGainLoss		59us-gaap_MarketableSecuritiesRealizedGainLoss
Loss from continuing operations before income taxes	(331)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	(374)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	(521)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	(355)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax benefit	129us-gaap_IncomeTaxExpenseBenefit	36us-gaap_IncomeTaxExpenseBenefit	138us-gaap_IncomeTaxExpenseBenefit	35us-gaap_IncomeTaxExpenseBenefit
Loss from continuing operations	(202)us-gaap_IncomeLossFromContinuingOperations	(338)us-gaap_IncomeLossFromContinuingOperations	(383)us-gaap_IncomeLossFromContinuingOperations	(320)us-gaap_IncomeLossFromContinuingOperations
Income from discontinued operations, net of income taxes	10us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity		21us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	194us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net loss	(192)us-gaap_NetIncomeLoss	(338)us-gaap_NetIncomeLoss	(362)us-gaap_NetIncomeLoss	(126)us-gaap_NetIncomeLoss
Other comprehensive income, net of tax:
Unrealized gain from marketable equity investments	162us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	148us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	173us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	204us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
Less: Reclassification of realized gains included in net loss	(59)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax		(59)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
Comprehensive income (loss)	$ (89)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	$ (190)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	$ (248)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	$ 78us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Basic and diluted net loss per share:
Loss from continuing operations (in dollars per share)	$ (0.05)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	$ (0.10)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	$ (0.09)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	$ (0.10)us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare
Income from discontinued operations (in dollars per share)				$ 0.06us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare
Net loss (in dollars per share)	$ (0.05)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.10)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.09)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.04)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average common shares outstanding:
Basic (in shares)	4,170us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	3,343us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	4,190us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	3,344us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted (in shares)	4,170us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	3,343us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	4,190us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	3,344us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Common shares outstanding (in shares)	4,170us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3,343us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	4,170us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3,344us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted

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