$EFOI
ENERGY FOCUS, INC/DE Stock $efoi

$efoi Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000092416821000029 Filed on May 13, 2021

Income Statement

Concept	2021 Q1	2020 Q4	2020 Q1
Revenue	$2.637M	$3.746M	$3.783M
YoY Change	-30.29%	6.09%	19.07%
Cost Of Revenue	$2.084M	$2.310M	$2.751M
YoY Change	-24.25%	-10.12%	-10.65%
Gross Profit	$553.0K	$1.434M	$1.032M
YoY Change	-46.41%	49.84%	953.06%
Gross Profit Margin	20.97%	38.28%	27.28%
Selling, General & Admin	$2.218M	$1.900M	$2.027M
YoY Change	9.42%	-1.55%	-9.55%
% of Gross Profit	401.08%	132.5%	196.41%
Research & Development	$653.0K	$420.0K	$282.0K
YoY Change	131.56%	68.0%	-46.39%
% of Gross Profit	118.08%	29.29%	27.33%
Depreciation & Amortization	$47.00K	$40.00K	$46.00K
YoY Change	2.17%	-20.0%	-56.19%
% of Gross Profit	8.5%	2.79%	4.46%
Operating Expenses	$2.852M	$2.320M	$2.295M
YoY Change	24.27%	6.42%	-20.89%
Operating Profit	-$2.299M	-$886.0K	-$1.263M
YoY Change	82.03%	-27.56%	-54.94%
Interest Expense	$127.0K	$1.050M	$133.0K
YoY Change	-4.51%	-683.33%	209.3%
% of Operating Profit
Other Income/Expense, Net	-$17.00K	-$10.00K	-$18.00K
YoY Change	-5.56%	-120.0%	-5.26%
Pretax Income	-$1.640M	$60.00K	-$540.0K
YoY Change	203.7%	-104.62%	-81.15%
Income Tax		$0.00
% Of Pretax Income		0.0%
Net Earnings	-$1.642M	$65.00K	-$541.0K
YoY Change	203.51%	-104.97%	-81.12%
Net Earnings / Revenue	-62.27%	1.74%	-14.3%
Basic Earnings Per Share	-$0.45	$0.01	-$0.18
Diluted Earnings Per Share	-$0.45	$0.01	-$0.18
COMMON SHARES
Basic Shares Outstanding	3.612M shares	3.491M shares	3.086M shares
Diluted Shares Outstanding	3.612M shares	4.307M shares	3.086M shares

Balance Sheet

Concept	2021 Q1	2020 Q4	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.330M	$2.630M	$2.910M
YoY Change	-54.3%	651.43%	-24.61%
Cash & Equivalents	$548.0K	$1.836M	$2.911M
Short-Term Investments	$780.0K	$800.0K
Other Short-Term Assets	$780.0K	$1.000K	$670.0K
YoY Change	16.42%	-99.79%	17.54%
Inventory	$7.515M	$5.641M	$4.700M
Prepaid Expenses
Receivables	$1.492M	$2.021M	$1.904M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$11.12M	$11.08M	$10.18M
YoY Change	9.19%	18.66%	-32.45%
LONG-TERM ASSETS
Property, Plant & Equipment	$482.0K	$420.0K	$390.0K
YoY Change	23.59%	7.97%	-23.53%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$50.00K	$0.00	$405.0K
YoY Change	-87.65%	-100.0%	90.14%
Total Long-Term Assets	$1.212M	$1.321M	$2.242M
YoY Change	-45.94%	-45.07%	-24.46%
TOTAL ASSETS
Total Short-Term Assets	$11.12M	$11.08M	$10.18M
Total Long-Term Assets	$1.212M	$1.321M	$2.242M
Total Assets	$12.33M	$12.40M	$12.42M
YoY Change	-0.76%	5.61%	-31.13%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.437M	$2.477M	$1.188M
YoY Change	189.31%	84.85%	-47.32%
Accrued Expenses	$1.870M	$1.412M	$1.750M
YoY Change	6.86%	39.53%	1.16%
Deferred Revenue	$73.00K	$72.00K
YoY Change
Short-Term Debt	$3.420M	$2.300M	$790.0K
YoY Change	332.91%	-4.96%	-76.76%
Long-Term Debt Due	$0.00	$530.0K	$860.0K
YoY Change	-100.0%	-40.45%
Total Short-Term Liabilities	$8.879M	$7.557M	$5.674M
YoY Change	56.49%	15.52%	-27.4%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$270.0K	$0.00
YoY Change		145.45%	-100.0%
Other Long-Term Liabilities	$170.0K	$0.00	$7.000K
YoY Change	2328.57%	-100.0%	-76.67%
Total Long-Term Liabilities	$170.0K	$0.00	$7.000K
YoY Change	2328.57%	-100.0%	-76.67%
TOTAL LIABILITIES
Total Short-Term Liabilities	$8.879M	$7.557M	$5.674M
Total Long-Term Liabilities	$170.0K	$0.00	$7.000K
Total Liabilities	$9.051M	$8.142M	$6.539M
YoY Change	38.42%	5.15%	-31.93%
SHAREHOLDERS EQUITY
Retained Earnings	-$132.5M	-$130.9M	-$125.4M
YoY Change	5.65%	4.79%	4.19%
Common Stock	$135.8M	$135.1M	$131.3M
YoY Change	3.41%	4.84%	1.94%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.278M	$4.255M	$5.883M
YoY Change
Total Liabilities & Shareholders Equity	$12.33M	$12.40M	$12.42M
YoY Change	-0.76%	5.61%	-31.13%

Cashflow Statement

Concept	2021 Q1	2020 Q4	2020 Q1
OPERATING ACTIVITIES
Net Income	-$1.642M	$65.00K	-$541.0K
YoY Change	203.51%	-104.97%	-81.12%
Depreciation, Depletion And Amortization	$47.00K	$40.00K	$46.00K
YoY Change	2.17%	-20.0%	-56.19%
Cash From Operating Activities	-$2.783M	-$870.0K	$504.0K
YoY Change	-652.18%	200.0%	-114.17%
INVESTING ACTIVITIES
Capital Expenditures	$109.0K	-$50.00K	$47.00K
YoY Change	131.91%	-28.57%	840.0%
Acquisitions
YoY Change
Other Investing Activities		$0.00	$0.00
YoY Change
Cash From Investing Activities	-$109.0K	-$50.00K	-$47.00K
YoY Change	131.91%	-28.57%	1075.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$1.604M	180.0K	$2.104M
YoY Change	-23.76%	-55.0%	93.74%
NET CHANGE
Cash From Operating Activities	-$2.783M	-870.0K	$504.0K
Cash From Investing Activities	-$109.0K	-50.00K	-$47.00K
Cash From Financing Activities	$1.604M	180.0K	$2.104M
Net Change In Cash	-$1.288M	-740.0K	$2.561M
YoY Change	-150.29%	-1950.0%	-203.52%
FREE CASH FLOW
Cash From Operating Activities	-$2.783M	-$870.0K	$504.0K
Capital Expenditures	$109.0K	-$50.00K	$47.00K
Free Cash Flow	-$2.892M	-$820.0K	$457.0K
YoY Change	-732.82%	272.73%	-112.83%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000924168
CY2021Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2021Q1	dei	Amendment Flag AmendmentFlag	false
CY2021Q1	dei	Entity Registrant Name EntityRegistrantName	ENERGY FOCUS, INC/DE
CY2020Q1	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2020Q1	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2020Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2020Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2021Q1	dei	Document Type DocumentType	10-Q
CY2021Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2021Q1	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
CY2021Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2021Q1	dei	Entity File Number EntityFileNumber	001-36583
CY2021Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	94-3021850
CY2021Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	32000 Aurora Road
CY2021Q1	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite B
CY2021Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Solon
CY2021Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
CY2021Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	44139
CY2021Q1	dei	City Area Code CityAreaCode	(440)
CY2021Q1	dei	Local Phone Number LocalPhoneNumber	715-1300
CY2021Q1	dei	Security12b Title Security12bTitle	Common Stock, par value $0.0001 per share
CY2021Q1	dei	Trading Symbol TradingSymbol	EFOI
CY2021Q1	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021Q1	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2021Q1	dei	Entity Small Business EntitySmallBusiness	true
CY2021Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021Q1	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	4027271	shares
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	548000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1836000	USD
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	14000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	8000	USD
CY2021Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1492000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	2021000	USD
CY2021Q1	us-gaap	Inventory Net InventoryNet	7515000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	5641000	USD
CY2021Q1	us-gaap	Deposits Assets Current DepositsAssetsCurrent	784000	USD
CY2020Q4	us-gaap	Deposits Assets Current DepositsAssetsCurrent	796000	USD
CY2021Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	778000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	782000	USD
CY2021Q1	us-gaap	Assets Current AssetsCurrent	11117000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	11076000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	482000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	420000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	676000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	794000	USD
CY2021Q1	efoi	Restructured Operating Lease Right Of Use Asset RestructuredOperatingLeaseRightOfUseAsset	54000	USD
CY2020Q4	efoi	Restructured Operating Lease Right Of Use Asset RestructuredOperatingLeaseRightOfUseAsset	107000	USD
CY2021Q1	us-gaap	Assets Assets	12329000	USD
CY2020Q4	us-gaap	Assets Assets	12397000	USD
CY2021Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	3437000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2477000	USD
CY2021Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	177000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	45000	USD
CY2021Q1	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	19000	USD
CY2020Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	149000	USD
CY2021Q1	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	787000	USD
CY2020Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	885000	USD
CY2021Q1	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	29000	USD
CY2020Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	95000	USD
CY2021Q1	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	5000	USD
CY2020Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	11000	USD
CY2021Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	239000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	227000	USD
CY2021Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	73000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	72000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	609000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	598000	USD
CY2021Q1	efoi	Restructured Operating Lease Liability Current RestructuredOperatingLeaseLiabilityCurrent	85000	USD
CY2020Q4	efoi	Restructured Operating Lease Liability Current RestructuredOperatingLeaseLiabilityCurrent	168000	USD
CY2021Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3000	USD
CY2021Q1	efoi	Payment Protection Program Current PaymentProtectionProgramCurrent	0	USD
CY2020Q4	efoi	Payment Protection Program Current PaymentProtectionProgramCurrent	529000	USD
CY2021Q1	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	3416000	USD
CY2020Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	2298000	USD
CY2021Q1	us-gaap	Liabilities Current LiabilitiesCurrent	8879000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	7557000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	172000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	318000	USD
CY2021Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	0	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1000	USD
CY2021Q1	efoi	Payment Protection Program Noncurrent PaymentProtectionProgramNoncurrent	0	USD
CY2020Q4	efoi	Payment Protection Program Noncurrent PaymentProtectionProgramNoncurrent	266000	USD
CY2021Q1	us-gaap	Liabilities Liabilities	9051000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	8142000	USD
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2021Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2021Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2021Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	2597470	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	2597470	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	2597470	shares
CY2021Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	2597470	shares
CY2021Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2021Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2021Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2021Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	3682816	shares
CY2021Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3682816	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3525374	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	3525374	shares
CY2021Q1	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2021Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	135778000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	135113000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-130855000	USD
CY2021Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3000	USD
CY2021Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-132497000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	3278000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4255000	USD
CY2021Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12329000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12397000	USD
CY2021Q1	us-gaap	Revenues Revenues	2637000	USD
CY2020Q1	us-gaap	Revenues Revenues	3783000	USD
CY2021Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2084000	USD
CY2020Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2751000	USD
CY2021Q1	us-gaap	Gross Profit GrossProfit	553000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	1032000	USD
CY2021Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	653000	USD
CY2020Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	282000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	-1642000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-541000	USD
CY2021Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	2218000	USD
CY2020Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	2027000	USD
CY2021Q1	us-gaap	Restructuring Costs RestructuringCosts	-19000	USD
CY2020Q1	us-gaap	Restructuring Costs RestructuringCosts	-14000	USD
CY2021Q1	us-gaap	Operating Expenses OperatingExpenses	2852000	USD
CY2020Q1	us-gaap	Operating Expenses OperatingExpenses	2295000	USD
CY2021Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-2299000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-1263000	USD
CY2021Q1	us-gaap	Interest Expense InterestExpense	127000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	133000	USD
CY2021Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	801000	USD
CY2020Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2021Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0	USD
CY2020Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-873000	USD
CY2021Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-17000	USD
CY2020Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-18000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.45
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-0.18
CY2021Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3612000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3086000	shares
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	-1642000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-541000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2020Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1642000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-541000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4255000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	0	USD
CY2021Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	527000	USD
CY2021Q1	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	140000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-1642000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	3278000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	3996000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	0	USD
CY2020Q1	us-gaap	Stock And Warrants Issued During Period Value Preferred Stock And Warrants StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants	2749000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	474000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	-1636000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	20000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-541000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	5883000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-1642000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-541000	USD
CY2021Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	801000	USD
CY2020Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2021Q1	us-gaap	Depreciation Depreciation	47000	USD
CY2020Q1	us-gaap	Depreciation Depreciation	46000	USD
CY2021Q1	us-gaap	Share Based Compensation ShareBasedCompensation	140000	USD
CY2020Q1	us-gaap	Share Based Compensation ShareBasedCompensation	20000	USD
CY2021Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0	USD
CY2020Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-873000	USD
CY2021Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	6000	USD
CY2020Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-12000	USD
CY2021Q1	us-gaap	Inventory Write Down InventoryWriteDown	89000	USD
CY2020Q1	us-gaap	Inventory Write Down InventoryWriteDown	-78000	USD
CY2021Q1	efoi	Increase Decrease In Provision For Warranties IncreaseDecreaseInProvisionForWarranties	12000	USD
CY2020Q1	efoi	Increase Decrease In Provision For Warranties IncreaseDecreaseInProvisionForWarranties	44000	USD
CY2021Q1	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	-38000	USD
CY2020Q1	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	-38000	USD
CY2021Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-532000	USD
CY2020Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-445000	USD
CY2021Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1963000	USD
CY2020Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1546000	USD
CY2021Q1	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-12000	USD
CY2021Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-4000	USD
CY2020Q1	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	240000	USD
CY2020Q1	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	222000	USD
CY2020Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-53000	USD
CY2021Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	951000	USD
CY2020Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-152000	USD
CY2021Q1	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-209000	USD
CY2021Q1	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	1000	USD
CY2020Q1	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-14000	USD
CY2021Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-1141000	USD
CY2020Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1045000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2783000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	504000	USD
CY2021Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	109000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	47000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-109000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-47000	USD
CY2021Q1	efoi	Proceeds From Issuance Of Common Stock And Warrants ProceedsFromIssuanceOfCommonStockAndWarrants	0	USD
CY2020Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	USD
CY2021Q1	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2020Q1	efoi	Proceeds From Issuance Of Common Stock And Warrants ProceedsFromIssuanceOfCommonStockAndWarrants	2750000	USD
CY2021Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	527000	USD
CY2020Q1	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	474000	USD
CY2021Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1000	USD
CY2020Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1000	USD
CY2021Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2000	USD
CY2020Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2021Q1	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
CY2020Q1	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	226000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1604000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2104000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1288000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2561000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2178000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	692000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	890000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3253000	USD
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	548000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2911000	USD
CY2021Q1	us-gaap	Restricted Cash RestrictedCash	342000	USD
CY2020Q1	us-gaap	Restricted Cash RestrictedCash	342000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	890000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3253000	USD
CY2021Q1	us-gaap	Nature Of Operations NatureOfOperations	NATURE OF<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">OPERATIONS</span><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Energy Focus, Inc. engages primarily in the design, development, manufacturing, marketing and sale of energy-efficient lighting systems and controls and recently announced development of ultraviolet-C light disinfection (“UVCD”) products. We develop, market and sell high quality light-emitting diode (“LED”) lighting products and UVCD products and controls in the commercial market and military maritime market (“MMM”). Our mission is to enable our customers to run their facilities and offices with greater energy efficiency, productivity, and human health through advanced LED retrofit and UVCD solutions. Our goal is to be the LED and human-centric lighting (“HCL”) technology and market leader for the most demanding applications where performance, quality, value (high quality at an affordable price), environmental impact and health are considered paramount. We specialize in LED lighting retrofit by replacing fluorescent, high-intensity discharge lighting and other types of lamps in institutional buildings for primarily indoor lighting applications with our innovative, high-quality commercial and military tubular LED (“TLED”), as well as other LED and lighting control products. On October 14, 2020, we also announced the launch of our UVCD product portfolio which is being brought to market in 2021.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">On June 11, 2020, in accordance with previous stockholder approval, our Board of Directors effected a 1-for-5 (the “Split Ratio”) reverse stock split of the Company’s common stock, par value $0.0001 per share. The reverse stock split became effective immediately upon the filing of the Certificate of Amendment to the Company’s Certificate of Incorporation, as amended (the “Certificate of Incorporation”), with the Delaware Secretary of State (the “Effective Time”). At the Effective Time, every five shares of common stock issued and outstanding automatically combined into one validly issued, fully paid and non-assessable share of common stock. No fractional shares were issued as a result of the reverse stock split. The $0.0001 par value per share of common stock and other terms of the common stock were not affected by the reverse stock split. The number of authorized shares of common stock under the Certificate of Incorporation remained unchanged at 50,000,000 shares. Proportional adjustments were made to the conversion and exercise prices of our outstanding warrants and stock options, and to the number of shares issued and issuable under our stock incentive plans in connection with the reverse stock split. The information presented in the financial statements for all prior periods have been retroactively adjusted to reflect the reverse stock split. Preferred shares outstanding were not affected by the reverse stock split and, as such, those shares have not been adjusted.</span></div>
CY2020Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2021Q1	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of estimates</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management’s best knowledge of current events and actions that may impact us in the future, actual results may vary from the estimates. Estimates include, but are not limited to, the establishment of reserves for accounts receivable, sales returns, inventory obsolescence and warranty claims; the useful lives of property and equipment; valuation allowance for net deferred taxes; the cost and offsetting income related to sub-leased property; and stock-based compensation. In addition, estimates and assumptions associated with the determination of the fair value of financial instruments and evaluation of long-lived assets for impairment requires considerable judgment. Actual results could differ from those estimates and such differences could be material.</span></div>
CY2021Q1	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Certain risks and concentrations</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have certain customers whose net sales individually represented 10% or more of our total net sales, or whose net trade accounts receivable balance individually represented 10% or more of our total net trade accounts receivable; we have certain suppliers, which individually represent 10% or more of our total purchases, or whose trade accounts payable balance individually represented 10% or more of our total trade accounts payable balance, as follows:</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For the three months ended March 31, 2021, sales to our primary distributor for the U.S. Navy and a regional commercial lighting retrofit company accounted for approximately 50% and 11% of net sales, respectively. When sales to our primary distributor for the U.S. Navy are combined with sales to shipbuilders for the U.S. Navy, total net sales of products for the U.S. Navy comprised approximately 57% of net sales for the same period. For the three months ended March 31, 2020, sales to our primary distributor for the U.S. Navy and a regional commercial lighting retrofit company accounted for approximately 38% and 15% of net sales, respectively. When sales to our primary distributor for the U.S. Navy are combined with sales to shipbuilders for the U.S. Navy, total net sales of products for the U.S. Navy comprised approximately 46% of net sales for the same period.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">Our primary distributor for the U.S. Navy and a regional commercial lighting retrofit company accounted for approximately 45% and 16% of net trade accounts receivable, respectively, at March 31, 2021. At December 31, 2020, our primary distributor to the U.S. Navy accounted for 28% of our net trade accounts receivable and a shipbuilder for the U.S. Navy accounted for 21% of our net trade accounts receivable. </span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">One offshore supplier accounted for approximately 26% and 22%, respectively, of our total expenditures for the three months ended March 31, 2021 and March 31, 2020. At March 31, 2021, this same offshore supplier and one domestic supplier accounted for approximately 39% and 10% of our trade accounts payable balance, respectively. At December 31, 2020 this same offshore supplier accounted for approximately 44% of our trade accounts payable balance.</span></div>
CY2021Q1	us-gaap	Revenues Revenues	2637000	USD
CY2020Q1	us-gaap	Revenues Revenues	3783000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	-1642000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-541000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3612000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3086000	shares
CY2020Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	227000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	195000	USD
CY2021Q1	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	17000	USD
CY2020Q1	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	7000	USD
CY2021Q1	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	14000	USD
CY2020Q1	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	44000	USD
CY2021Q1	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	19000	USD
CY2020Q1	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	6000	USD
CY2021Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	239000	USD
CY2020Q1	efoi	Payments For Clearing Fees PaymentsForClearingFees	231000	USD
CY2020	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	510000	USD
CY2020Q1	efoi	Proceeds From The Issuance Of Common Stock And Warrants Net Of Issuance Costs ProceedsFromTheIssuanceOfCommonStockAndWarrantsNetOfIssuanceCosts	2300000	USD
CY2020Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	240000	USD
CY2020Q1	efoi	Debt Instrument Proceeds To Be Paid To Lender Percent DebtInstrumentProceedsToBePaidToLenderPercent	0.10
CY2020Q1	efoi	Debt Instrument Proceeds To Be Paid To Lender Percent DebtInstrumentProceedsToBePaidToLenderPercent	0.10
CY2020Q1	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	275000	USD
CY2021Q1	efoi	Class Of Warrant Or Right Warrants Issued ClassOfWarrantOrRightWarrantsIssued	310860	shares
CY2021Q1	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	3.59
CY2021Q1	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	1100000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercised ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised	156446	shares
CY2021Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	527000	USD
CY2019Q4	us-gaap	Other Deferred Compensation Arrangements Liability Current OtherDeferredCompensationArrangementsLiabilityCurrent	0	USD
CY2020Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	1636000	USD
CY2020Q1	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-873000	USD
CY2020Q1	us-gaap	Other Deferred Compensation Arrangements Liability Current OtherDeferredCompensationArrangementsLiabilityCurrent	763000	USD
CY2021Q1	us-gaap	Restructuring Costs RestructuringCosts	-19000	USD
CY2020Q1	us-gaap	Restructuring Costs RestructuringCosts	-14000	USD
CY2020Q1	efoi	Proceeds From The Issuance Of Common Stock And Warrants Net Of Issuance Costs ProceedsFromTheIssuanceOfCommonStockAndWarrantsNetOfIssuanceCosts	2300000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	1714000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4255000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	3278000	USD
CY2021Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	4373000	USD
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	2695000	USD
CY2021Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	6125000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	5840000	USD
CY2021Q1	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	2983000	USD
CY2020Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	2894000	USD
CY2021Q1	us-gaap	Inventory Net InventoryNet	7515000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	5641000	USD
CY2020Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	2894000	USD
CY2019Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	3518000	USD
CY2021Q1	efoi	Inventory Valuation Reserves Provision Accrual InventoryValuationReservesProvisionAccrual	-101000	USD
CY2020	efoi	Inventory Valuation Reserves Provision Accrual InventoryValuationReservesProvisionAccrual	281000	USD
CY2021Q1	efoi	Inventory Valuation Reserves Sales Of Inventory InventoryValuationReservesSalesOfInventory	12000	USD
CY2020	efoi	Inventory Valuation Reserves Sales Of Inventory InventoryValuationReservesSalesOfInventory	343000	USD
CY2020Q1	us-gaap	Depreciation Depreciation	46000	USD
CY2021Q1	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	2983000	USD
CY2020Q4	efoi	Inventory Valuation Reserves Raw Materials InventoryValuationReservesRawMaterials	2894000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3193000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3084000	USD
CY2021Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2711000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2664000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	482000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	420000	USD
CY2021Q1	us-gaap	Depreciation Depreciation	47000	USD
CY2021Q1	efoi	Lessee Operating Lease Interest Rate Effective Rate LesseeOperatingLeaseInterestRateEffectiveRate	0.1593
CY2021Q1	us-gaap	Lessee Operating Lease Discount Rate LesseeOperatingLeaseDiscountRate	0.0725
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P1Y7M6D
CY2021Q1	efoi	Restructured Leases Operating Lease Weighted Average Remaining Lease Term RestructuredLeasesOperatingLeaseWeightedAverageRemainingLeaseTerm	P0Y3M18D
CY2021Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y1M6D
CY2021Q1	us-gaap	Restricted Cash RestrictedCash	300000	USD
CY2021Q1	us-gaap	Sublease Income SubleaseIncome	25000	USD
CY2020Q1	us-gaap	Sublease Income SubleaseIncome	25000	USD
CY2021Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	143000	USD
CY2020Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	152000	USD
CY2021Q1	efoi	Operating Lease Cost Net Of Sublease Income OperatingLeaseCostNetOfSubleaseIncome	118000	USD
CY2020Q1	efoi	Operating Lease Cost Net Of Sublease Income OperatingLeaseCostNetOfSubleaseIncome	127000	USD
CY2021Q1	efoi	Restructured Lease Sublease Income RestructuredLeaseSubleaseIncome	68000	USD
CY2020Q1	efoi	Restructured Lease Sublease Income RestructuredLeaseSubleaseIncome	68000	USD
CY2021Q1	efoi	Restructured Lease Operating Lease Cost RestructuredLeaseOperatingLeaseCost	56000	USD
CY2020Q1	efoi	Restructured Lease Operating Lease Cost RestructuredLeaseOperatingLeaseCost	61000	USD
CY2021Q1	efoi	Restructured Lease Operating Lease Cost Net Of Sublease Income RestructuredLeaseOperatingLeaseCostNetOfSubleaseIncome	-12000	USD
CY2020Q1	efoi	Restructured Lease Operating Lease Cost Net Of Sublease Income RestructuredLeaseOperatingLeaseCostNetOfSubleaseIncome	-7000	USD
CY2021Q1	us-gaap	Lease Cost LeaseCost	106000	USD
CY2020Q1	us-gaap	Lease Cost LeaseCost	120000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	676000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	794000	USD
CY2021Q1	efoi	Restructured Operating Lease Right Of Use Asset RestructuredOperatingLeaseRightOfUseAsset	54000	USD
CY2020Q4	efoi	Restructured Operating Lease Right Of Use Asset RestructuredOperatingLeaseRightOfUseAsset	107000	USD
CY2021Q1	efoi	Operating Lease Rightof Use Asset Including Restructured Leases OperatingLeaseRightofUseAssetIncludingRestructuredLeases	730000	USD
CY2020Q4	efoi	Operating Lease Rightof Use Asset Including Restructured Leases OperatingLeaseRightofUseAssetIncludingRestructuredLeases	901000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	781000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	916000	USD
CY2021Q1	efoi	Restructured Operating Lease Liability RestructuredOperatingLeaseLiability	85000	USD
CY2020Q4	efoi	Restructured Operating Lease Liability RestructuredOperatingLeaseLiability	168000	USD
CY2021Q1	efoi	Operating Lease Liability Including Restructured Leases OperatingLeaseLiabilityIncludingRestructuredLeases	866000	USD
CY2020Q4	efoi	Operating Lease Liability Including Restructured Leases OperatingLeaseLiabilityIncludingRestructuredLeases	1084000	USD
CY2021Q1	efoi	Finance Lease Right Of Use Asset Gross FinanceLeaseRightOfUseAssetGross	13000	USD
CY2020Q4	efoi	Finance Lease Right Of Use Asset Gross FinanceLeaseRightOfUseAssetGross	13000	USD
CY2021Q1	efoi	Finance Lease Right Of Use Asset Accumulated Depreciation FinanceLeaseRightOfUseAssetAccumulatedDepreciation	10000	USD
CY2020Q4	efoi	Finance Lease Right Of Use Asset Accumulated Depreciation FinanceLeaseRightOfUseAssetAccumulatedDepreciation	9000	USD
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	3000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	4000	USD
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	3000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4000	USD
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	3000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	621000	USD
CY2021Q1	efoi	Restructured Leases Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months RestructuredLeasesLesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	86000	USD
CY2021Q1	us-gaap	Lessor Operating Lease Payments To Be Received Next Rolling Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextRollingTwelveMonths	68000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	3000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	175000	USD
CY2021Q1	efoi	Restructured Leases Lessee Operating Lease Liability Payments Due In Rolling Year Two RestructuredLeasesLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	0	USD
CY2021Q1	us-gaap	Lessor Operating Lease Payments To Be Received Rolling Year Two LessorOperatingLeasePaymentsToBeReceivedRollingYearTwo	0	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	0	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	16000	USD
CY2021Q1	us-gaap	Lessor Operating Lease Payments To Be Received Rolling Year Three LessorOperatingLeasePaymentsToBeReceivedRollingYearThree	0	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	0	USD
CY2021Q1	efoi	Restructured Leases Lessee Operating Lease Liability Payments Due In Rolling Year Three RestructuredLeasesLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	0	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	3000	USD
CY2021Q1	efoi	Restructured Leases Lessee Operating Lease Liability Payments Due In Rolling Year Four RestructuredLeasesLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	0	USD
CY2021Q1	us-gaap	Lessor Operating Lease Payments To Be Received Rolling Year Four LessorOperatingLeasePaymentsToBeReceivedRollingYearFour	0	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	0	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	3000	USD
CY2021Q1	efoi	Restructured Leases Lessee Operating Lease Liability Payments Due In Rolling Year Five RestructuredLeasesLesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	0	USD
CY2021Q1	us-gaap	Lessor Operating Lease Payments To Be Received Rolling Year Five LessorOperatingLeasePaymentsToBeReceivedRollingYearFive	0	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due In Rolling Year Five FinanceLeaseLiabilityPaymentsDueInRollingYearFive	0	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	818000	USD
CY2021Q1	efoi	Restructured Leases Lessee Operating Lease Liability Payments Due RestructuredLeasesLesseeOperatingLeaseLiabilityPaymentsDue	86000	USD
CY2021Q1	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	68000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	3000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	37000	USD
CY2021Q1	efoi	Restructured Leases Lessee Operating Lease Liability Undiscounted Excess Amount RestructuredLeasesLesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1000	USD
CY2021Q1	efoi	Lessor Operating Lease Liability Undiscounted Excess Amount LessorOperatingLeaseLiabilityUndiscountedExcessAmount	0	USD
CY2021Q1	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	0	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	781000	USD
CY2021Q1	efoi	Restructured Operating Lease Liability RestructuredOperatingLeaseLiability	85000	USD
CY2021Q1	efoi	Operating Lease Receivable OperatingLeaseReceivable	68000	USD
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	3000	USD
CY2021Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	136000	USD
CY2020Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	135000	USD
CY2021Q1	efoi	Restructured Leases Operating Lease Payments RestructuredLeasesOperatingLeasePayments	17000	USD
CY2020Q1	efoi	Restructured Leases Operating Lease Payments RestructuredLeasesOperatingLeasePayments	17000	USD
CY2021Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1000	USD
CY2020Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1000	USD
CY2020Q3	efoi	Debt Instrument Number Of Credit Facilities DebtInstrumentNumberOfCreditFacilities	2	creditFacility
CY2020Q1	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	275000	USD
CY2020Q4	efoi	Payment Protection Program Current PaymentProtectionProgramCurrent	529000	USD
CY2020Q4	efoi	Payment Protection Program Noncurrent PaymentProtectionProgramNoncurrent	266000	USD
CY2021Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	801000	USD
CY2020Q4	efoi	Deferred Tax Assets Operating Loss Carryforwards Portion Available After Application Of Irc Section382 Limitations DeferredTaxAssetsOperatingLossCarryforwardsPortionAvailableAfterApplicationOfIRCSection382Limitations	61500000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	7100000	USD
CY2019Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	8300000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	37300000	USD
CY2020Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2019Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2020Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q1	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	275000	USD
CY2020Q1	efoi	Percentage Of Series A Preferred Stock Eligible To Vote PercentageOfSeriesAPreferredStockEligibleToVote	0.1107
CY2020Q1	efoi	Payments For Clearing Fees PaymentsForClearingFees	231000	USD
CY2020	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	510000	USD
CY2020Q1	efoi	Proceeds From The Issuance Of Common Stock And Warrants Net Of Issuance Costs ProceedsFromTheIssuanceOfCommonStockAndWarrantsNetOfIssuanceCosts	2300000	USD
CY2020Q1	efoi	Debt Instrument Proceeds To Be Paid To Lender Percent DebtInstrumentProceedsToBePaidToLenderPercent	0.10
CY2020Q1	efoi	Debt Instrument Proceeds To Be Paid To Lender Percent DebtInstrumentProceedsToBePaidToLenderPercent	0.10
CY2021Q1	efoi	Class Of Warrant Or Right Warrants Issued ClassOfWarrantOrRightWarrantsIssued	310860	shares
CY2021Q1	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	3.59
CY2021Q1	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	1100000	USD
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Exercised ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised	156446	shares
CY2021Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	527000	USD
CY2021Q1	efoi	Class Of Warrant Or Right Warrants Issued ClassOfWarrantOrRightWarrantsIssued	310860	shares
CY2020Q1	efoi	Class Of Warrant Or Right Warrants Issued ClassOfWarrantOrRightWarrantsIssued	736545	shares
CY2021Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	140000	USD
CY2020Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	20000	USD
CY2021Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	600000	USD
CY2020Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	200000	USD
CY2021Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y6M
CY2021Q1	us-gaap	Share Price SharePrice	4.26
CY2020Q1	us-gaap	Share Price SharePrice	1.12
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice	5.51
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice	1.48
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y2M12D
CY2020Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y1M6D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.008
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.007
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.963
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.928
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.000
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	221450	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	3.45
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	72120	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	5.51
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	4459	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	2.77
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	1500	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	53.50
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	287611	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	3.71
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y10M24D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	228312	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	3.68
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P8Y9M18D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	62154	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	4.25
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P8Y1M6D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	8.64
CY2021Q1	us-gaap	Purchase Obligation PurchaseObligation	4200000	USD

Files In Submission

Name	View Source	Status
0000924168-21-000029-index-headers.html	Edgar Link	pending
0000924168-21-000029-index.html	Edgar Link	pending
0000924168-21-000029.txt	Edgar Link	pending
0000924168-21-000029-xbrl.zip	Edgar Link	pending
a20210331exhibit31110-q.htm	Edgar Link	pending
a20210331exhibit31210-q.htm	Edgar Link	pending
a20210331exhibit32110-q.htm	Edgar Link	pending
efoi-20210331.htm	Edgar Link	pending
efoi-20210331.xsd	Edgar Link	pending
efoi-20210331_cal.xml	Edgar Link	unprocessable
efoi-20210331_def.xml	Edgar Link	unprocessable
efoi-20210331_htm.xml	Edgar Link	completed
efoi-20210331_lab.xml	Edgar Link	unprocessable
efoi-20210331_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$EFOI
ENERGY FOCUS, INC/DE Stock $efoi

2021 Q1 Form 10-Q Financial Statement

#000092416821000029 Filed on May 13, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EFOI ENERGY FOCUS, INC/DE Stock $efoi

2021 Q1 Form 10-Q Financial Statement

#000092416821000029 Filed on May 13, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EFOI
ENERGY FOCUS, INC/DE Stock $efoi