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Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statements of Operations [Abstract]
Net revenues	$ 2,263us-gaap_Revenues	$ 1,014us-gaap_Revenues
Cost of revenues	338us-gaap_CostOfRevenue	166us-gaap_CostOfRevenue
Gross margin	1,925us-gaap_GrossProfit	848us-gaap_GrossProfit
Operating expenses:
Product research and development	1,579us-gaap_ResearchAndDevelopmentExpense	1,784us-gaap_ResearchAndDevelopmentExpense
Sales and marketing	850us-gaap_SellingAndMarketingExpense	1,042us-gaap_SellingAndMarketingExpense
General and administrative	1,562us-gaap_GeneralAndAdministrativeExpense	2,029us-gaap_GeneralAndAdministrativeExpense
Total operating expenses	3,991us-gaap_OperatingExpenses	4,855us-gaap_OperatingExpenses
Operating loss	(2,066)us-gaap_OperatingIncomeLoss	(4,007)us-gaap_OperatingIncomeLoss
Other expense
Other expense, net	4us-gaap_OtherNonoperatingIncomeExpense
Total other expense	4us-gaap_NonoperatingIncomeExpense
Loss before provision for income taxes	(2,070)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	(4,007)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Provision for income taxes	2us-gaap_IncomeTaxExpenseBenefit	1us-gaap_IncomeTaxExpenseBenefit
Net loss	$ (2,072)us-gaap_NetIncomeLoss	$ (4,008)us-gaap_NetIncomeLoss
Loss per common share:
Basic and diluted loss per share	$ (0.05)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.11)us-gaap_EarningsPerShareBasicAndDiluted
Basic and diluted - weighted average number of common shares outstanding	40,455us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	37,941us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted

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