Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenues:
Projects	$ 2,966us-gaap_ContractsRevenue	$ 2,792us-gaap_ContractsRevenue
Products	1,133	1,203
Services	519us-gaap_SalesRevenueServicesNet	459us-gaap_SalesRevenueServicesNet
Total revenues	4,618us-gaap_Revenues	4,454us-gaap_Revenues
Cost of sales:
Projects	2,179us-gaap_ContractRevenueCost	1,960us-gaap_ContractRevenueCost
Products	800us-gaap_CostOfGoodsSold	951us-gaap_CostOfGoodsSold
Services	120us-gaap_CostOfServices	113us-gaap_CostOfServices
Total cost of sales	3,099us-gaap_CostOfGoodsAndServicesSold	3,024us-gaap_CostOfGoodsAndServicesSold
Gross profit	1,519us-gaap_GrossProfit	1,430us-gaap_GrossProfit
Operating expenses:
Research and development expenses, net of credits	565us-gaap_ResearchAndDevelopmentExpense	727us-gaap_ResearchAndDevelopmentExpense
Selling, general and administrative expenses	2,781	3,318
Total operating expenses	3,346us-gaap_OperatingExpenses	4,045us-gaap_OperatingExpenses
Operating loss	(1,827)us-gaap_OperatingIncomeLoss	(2,615)us-gaap_OperatingIncomeLoss
Finance income (expense), net	12ACFN_FinanceIncomeExpenseNet	(59)ACFN_FinanceIncomeExpenseNet
Loss before income taxes	(1,815)	(2,674)
Income tax benefit	33us-gaap_IncomeTaxExpenseBenefit	55us-gaap_IncomeTaxExpenseBenefit
Net loss from continuing operations	(1,782)	(2,619)
Loss from discontinued operations, net of income taxes	(1,152)	(1,956)
Net loss	(2,934)us-gaap_ProfitLoss	(4,575)us-gaap_ProfitLoss
Non-controlling interest share of net loss - continuing operations	20	25
Non-controlling interest share of net loss - discontinued operations	145	246
Net loss attributable to Acorn Energy, Inc. shareholders	$ (2,769)us-gaap_NetIncomeLoss	$ (4,304)us-gaap_NetIncomeLoss
Basic and diluted net loss per share attributable to Acorn Energy, Inc. shareholders:
Continuing operations	$ (0.07)	$ (0.11)
Discontinued operations	$ (0.04)	$ (0.08)
Total attributable to Acorn Energy, Inc. shareholders	$ (0.11)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.19)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average number of shares outstanding attributable to Acorn Energy, Inc. shareholders - basic and diluted	26,476	22,171

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