Debt	12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]
Debt	NOTE 7—DEBT (a) Loans payable On April 24, 2020, Acorn Energy, Inc. received Paycheck Protection Program (“PPP”) loan proceeds in the amount of $41,600. On April 30, 2020, OmniMetrix, LLC received PPP loan proceeds in the amount $419,800. Under the PPP of the Coronavirus Aid, Relief and Economic Security Act (the “Act”), up to the full principal amount of a loan and any accrued interest can be forgiven if the borrower uses all of the loan proceeds for forgivable purposes (payroll, benefits, lease/mortgage payments and/or utilities) required under the Act and any rule, regulation, or guidance issued by the Small Business Administration (the “SBA”) pursuant to the Act (collectively, the “Forgiveness Provisions”). The amount of forgiveness of the PPP loan depends on the borrower’s payroll costs over either an eight-week or twenty-four-week period beginning on the date of funding. Any processes or procedures established under the Forgiveness Provisions must be followed and any requirements of the Forgiveness Provisions must be fully satisfied to obtain such loan forgiveness. Pursuant to the provisions of the Act, the first six monthly payments of principal and interest will be deferred. Interest will accrue during the deferment period. The borrower must pay principal and interest payments on the fifth day of each month beginning seven months from the date of the applicable promissory note. On October 20, 2020, OmniMetrix submitted its PPP Loan Forgiveness Application to the SBA. On November 5, 2020, the SBA confirmed that OmniMetrix’s application for forgiveness had been approved and that its PPP loan, in the amount of $419,800 plus accrued interest of $2,162, had been forgiven. The Company elected not to apply for forgiveness of the PPP loan proceeds received by its parent entity, Acorn Energy, Inc., in the amount of $41,600 plus accrued interest of $206. This loan was repaid to the lender effective October 22, 2020. Aggregate interest expense on these loans at the time of forgiveness/repayment was approximately $1,000. (b) Line of credit In March 2019, OmniMetrix reinstated its loan and security agreement which provided OmniMetrix with access to accounts receivable formula-based financing of the lesser of 75% of eligible receivables or $1,000. Debt incurred under this financing arrangement bore interest at the greater of 6% and prime plus 1.5% per year. In addition, OmniMetrix was to pay a monthly service charge of 0.75% of the average aggregate principal amount outstanding for the prior month, for an effective rate of interest on advances of 15% at December 31, 2020. OmniMetrix also agreed to continue to maintain a minimum loan balance of $150,000 in its line-of-credit with the lender for a minimum of two years beginning March 1, 2019. From time to time, the balance outstanding could fall below $150,000 based on collections applied against the loan balance and the timing of loan draws. The monthly service charge and interest was calculated on the greater of the outstanding balance or $150,000. Interest expense for the year ended December 31, 2020 and 2019 was approximately $28,000 and $21,000, respectively. OmniMetrix had an outstanding balance of approximately $149,000 and $136,000 as of December 31, 2020 and 2019, respectively, pursuant to the loan and security agreement and approximately $191,000 was available to borrow. OmniMetrix paid off the outstanding balance in February 2021 and decided not to renew this line of credit, which expired in accordance with its terms on February 28, 2021.

Debt

12 Months Ended

Dec. 31, 2020

NOTE 7—DEBT

(a) Loans payable

On April 24, 2020, Acorn Energy, Inc. received Paycheck Protection Program (“PPP”) loan proceeds in the amount of $41,600.

On April 30, 2020, OmniMetrix, LLC received PPP loan proceeds in the amount $419,800.

Under the PPP of the Coronavirus Aid, Relief and Economic Security Act (the “Act”), up to the full principal amount of a loan and any accrued interest can be forgiven if the borrower uses all of the loan proceeds for forgivable purposes (payroll, benefits, lease/mortgage payments and/or utilities) required under the Act and any rule, regulation, or guidance issued by the Small Business Administration (the “SBA”) pursuant to the Act (collectively, the “Forgiveness Provisions”). The amount of forgiveness of the PPP loan depends on the borrower’s payroll costs over either an eight-week or twenty-four-week period beginning on the date of funding. Any processes or procedures established under the Forgiveness Provisions must be followed and any requirements of the Forgiveness Provisions must be fully satisfied to obtain such loan forgiveness. Pursuant to the provisions of the Act, the first six monthly payments of principal and interest will be deferred. Interest will accrue during the deferment period. The borrower must pay principal and interest payments on the fifth day of each month beginning seven months from the date of the applicable promissory note.

On October 20, 2020, OmniMetrix submitted its PPP Loan Forgiveness Application to the SBA. On November 5, 2020, the SBA confirmed that OmniMetrix’s application for forgiveness had been approved and that its PPP loan, in the amount of $419,800 plus accrued interest of $2,162, had been forgiven.

The Company elected not to apply for forgiveness of the PPP loan proceeds received by its parent entity, Acorn Energy, Inc., in the amount of $41,600 plus accrued interest of $206. This loan was repaid to the lender effective October 22, 2020.

Aggregate interest expense on these loans at the time of forgiveness/repayment was approximately $1,000.

(b) Line of credit

In March 2019, OmniMetrix reinstated its loan and security agreement which provided OmniMetrix with access to accounts receivable formula-based financing of the lesser of 75% of eligible receivables or $1,000. Debt incurred under this financing arrangement bore interest at the greater of 6% and prime plus 1.5% per year. In addition, OmniMetrix was to pay a monthly service charge of 0.75% of the average aggregate principal amount outstanding for the prior month, for an effective rate of interest on advances of 15% at December 31, 2020. OmniMetrix also agreed to continue to maintain a minimum loan balance of $150,000 in its line-of-credit with the lender for a minimum of two years beginning March 1, 2019. From time to time, the balance outstanding could fall below $150,000 based on collections applied against the loan balance and the timing of loan draws. The monthly service charge and interest was calculated on the greater of the outstanding balance or $150,000. Interest expense for the year ended December 31, 2020 and 2019 was approximately $28,000 and $21,000, respectively.

OmniMetrix had an outstanding balance of approximately $149,000 and $136,000 as of December 31, 2020 and 2019, respectively, pursuant to the loan and security agreement and approximately $191,000 was available to borrow.

OmniMetrix paid off the outstanding balance in February 2021 and decided not to renew this line of credit, which expired in accordance with its terms on February 28, 2021.