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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Revenue	$ 444us-gaap_SalesRevenueGoodsNet	$ 310us-gaap_SalesRevenueGoodsNet
Cost of goods sold	133us-gaap_CostOfGoodsSold	93us-gaap_CostOfGoodsSold
Gross profit	311us-gaap_GrossProfit	217us-gaap_GrossProfit
Operating expenses:
Selling, general and administrative	3,040us-gaap_SellingGeneralAndAdministrativeExpense	3,819us-gaap_SellingGeneralAndAdministrativeExpense
Research and development	979us-gaap_ResearchAndDevelopmentExpense	1,457us-gaap_ResearchAndDevelopmentExpense
Total operating expenses	4,019us-gaap_OperatingExpenses	5,276us-gaap_OperatingExpenses
Operating loss	(3,708)us-gaap_OperatingIncomeLoss	(5,059)us-gaap_OperatingIncomeLoss
Change in fair value of the warrant liability, net	209us-gaap_FairValueAdjustmentOfWarrants	(205)us-gaap_FairValueAdjustmentOfWarrants
Interest income	2us-gaap_InvestmentIncomeInterest	1us-gaap_InvestmentIncomeInterest
Other income (expense) and interest income (expense)	9us-gaap_OtherNonoperatingIncomeExpense	(15)us-gaap_OtherNonoperatingIncomeExpense
Net loss	(3,488)us-gaap_NetIncomeLoss	(5,278)us-gaap_NetIncomeLoss
Other comprehensive income (loss):
Foreign currency translation adjustments	(14)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	(2)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Comprehensive loss	$ (3,502)us-gaap_ComprehensiveIncomeNetOfTax	$ (5,280)us-gaap_ComprehensiveIncomeNetOfTax
Common share data:
Basic and diluted loss per share	$ (0.32)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.57)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average number of basic and diluted common shares outstanding	10,857,142us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	9,300,078us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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