Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	NOTE 22—SUBSEQUENT EVENTS Sale of interest in DSIT On January 28, 2016, the Company entered into a Share Purchase Agreement for the sale of a 50% strategic interest in its DSIT Solutions, Ltd. business to Rafael Advanced Defense Systems Ltd., a major Israeli defense company (the “DSIT Transaction”). Acorn expects to receive gross proceeds of approximately $4,913 before escrow, fees and taxes. Acorn is also eligible to receive its pro-rata share of a $1,000 earn-out over a three-year period. In addition to customary closing conditions, the DSIT Transaction requires the approval of the Israeli Ministry of Defense and the Israeli Anti-Trust Authority. Both approvals have already been received. Acorn expects that the DSIT Transaction will close in the first two weeks of April 2016. Following the sale, Acorn will own approximately 41.2% of DSIT. Loans from Directors In January 2016, the Company borrowed a total of $300 ($200 from one director and $100 from the other director) under promissory notes which mature three days following the receipt of proceeds from the closing of the DSIT Transaction. In March 2016, the Company borrowed an additional $75 from another director. Upon maturity, the Company is to pay to each director a single payment equal to 115% of the amounts borrowed under the promissory notes. The lender of the most recent loan has agreed to lend the Company up to an additional $75 upon request by the Company under similar terms. Resignation of the Company’s President and CEO Effective January 28, 2016, the Company’s President and CEO (John A. Moore) tendered his resignation to the Board. The Board determined that such resignation was for “Good Reason” as such term is defined under Mr. Moore’s Employment Agreement. Accordingly, commencing on or about July 28, 2016 and continuing until on or about July 27, 2017, the Company shall make aggregate severance payments to Mr. Moore of $425 as severance payment. The Company shall make such severance payment in accordance with its regular payroll practices. In addition, the Company will reimburse Mr. Moore up to an aggregate of $17 over the next twelve months for the costs associated with Mr. Moore’s medical insurance. In addition, in accordance with his Employment Agreement, all of Mr. Moore’s unvested options become vested as of the date of his resignation. Appointment of new President and CEO Effective January 28, 2016, Acorn engaged Jan H. Loeb to be the Company’s President and CEO under a consulting agreement (the “Consulting Agreement”) with a company (the “Consultant”) managed by Mr. Loeb. Under the Agreement, the Consultant is to be paid a monthly fee of $17 for the term of the Consulting Agreement (through January 7, 2017). Pursuant to the Consulting Agreement, on March 16, 2016, Acorn issued to the Consultant, for nominal consideration, warrants exercisable for 35,000 shares of Acorn common stock. The exercise price of the warrants is $0.13 per share. One-fourth of the warrants are immediately exercisable; the remainder becomes exercisable in equal increments on each of June 16, 2016, September 16, 2016 and December 16, 2016. The warrants expire on the earlier of (a) March 16, 2023 and (b) 18 months from the date Mr. Loeb ceases to be a director, officer, employee or consultant of Acorn. Special Meeting of the Stockholders of the Company On March 16, 2016, a Special Meeting of the stockholders of the Company was held which approved a proposal to amend the Company’s restated certificate of incorporation to increase the number of authorized shares of common stock of the Company from 30,000,000 to 42,000,000. OmniMetrix Line-of-Credit In February 2016, OmniMetrix signed a Loan and Security Agreement with a lender providing OmniMetrix with access to accounts receivable formula-based financing of up to $500. Debt incurred under this financing arrangement bears interest at the greater of prime (3.5% at December 31, 2015) plus 2% or 6% per year. In addition, OmniMetrix must pay a monthly service charge of 1.125% of the average aggregate principal amount outstanding for the prior month. Currently, while the Loan and Security Agreement reflects a $500 credit line, the lender has imposed a sublimit of $300 and has sole discretion as to when to remove the sublimit.

Subsequent Events

12 Months Ended

Dec. 31, 2015

NOTE 22—SUBSEQUENT EVENTS

Sale of interest in DSIT

On January 28, 2016, the Company entered into a Share Purchase Agreement for the sale of a 50% strategic interest in its DSIT Solutions, Ltd. business to Rafael Advanced Defense Systems Ltd., a major Israeli defense company (the “DSIT Transaction”). Acorn expects to receive gross proceeds of approximately $4,913 before escrow, fees and taxes. Acorn is also eligible to receive its pro-rata share of a $1,000 earn-out over a three-year period. In addition to customary closing conditions, the DSIT Transaction requires the approval of the Israeli Ministry of Defense and the Israeli Anti-Trust Authority. Both approvals have already been received. Acorn expects that the DSIT Transaction will close in the first two weeks of April 2016. Following the sale, Acorn will own approximately 41.2% of DSIT.

Loans from Directors

In January 2016, the Company borrowed a total of $300 ($200 from one director and $100 from the other director) under promissory notes which mature three days following the receipt of proceeds from the closing of the DSIT Transaction. In March 2016, the Company borrowed an additional $75 from another director. Upon maturity, the Company is to pay to each director a single payment equal to 115% of the amounts borrowed under the promissory notes. The lender of the most recent loan has agreed to lend the Company up to an additional $75 upon request by the Company under similar terms.

Resignation of the Company’s President and CEO

Effective January 28, 2016, the Company’s President and CEO (John A. Moore) tendered his resignation to the Board. The Board determined that such resignation was for “Good Reason” as such term is defined under Mr. Moore’s Employment Agreement. Accordingly, commencing on or about July 28, 2016 and continuing until on or about July 27, 2017, the Company shall make aggregate severance payments to Mr. Moore of $425 as severance payment. The Company shall make such severance payment in accordance with its regular payroll practices. In addition, the Company will reimburse Mr. Moore up to an aggregate of $17 over the next twelve months for the costs associated with Mr. Moore’s medical insurance. In addition, in accordance with his Employment Agreement, all of Mr. Moore’s unvested options become vested as of the date of his resignation.

Appointment of new President and CEO

Effective January 28, 2016, Acorn engaged Jan H. Loeb to be the Company’s President and CEO under a consulting agreement (the “Consulting Agreement”) with a company (the “Consultant”) managed by Mr. Loeb. Under the Agreement, the Consultant is to be paid a monthly fee of $17 for the term of the Consulting Agreement (through January 7, 2017). Pursuant to the Consulting Agreement, on March 16, 2016, Acorn issued to the Consultant, for nominal consideration, warrants exercisable for 35,000 shares of Acorn common stock. The exercise price of the warrants is $0.13 per share. One-fourth of the warrants are immediately exercisable; the remainder becomes exercisable in equal increments on each of June 16, 2016, September 16, 2016 and December 16, 2016. The warrants expire on the earlier of (a) March 16, 2023 and (b) 18 months from the date Mr. Loeb ceases to be a director, officer, employee or consultant of Acorn.

Special Meeting of the Stockholders of the Company

On March 16, 2016, a Special Meeting of the stockholders of the Company was held which approved a proposal to amend the Company’s restated certificate of incorporation to increase the number of authorized shares of common stock of the Company from 30,000,000 to 42,000,000.

OmniMetrix Line-of-Credit

In February 2016, OmniMetrix signed a Loan and Security Agreement with a lender providing OmniMetrix with access to accounts receivable formula-based financing of up to $500. Debt incurred under this financing arrangement bears interest at the greater of prime (3.5% at December 31, 2015) plus 2% or 6% per year. In addition, OmniMetrix must pay a monthly service charge of 1.125% of the average aggregate principal amount outstanding for the prior month. Currently, while the Loan and Security Agreement reflects a $500 credit line, the lender has imposed a sublimit of $300 and has sole discretion as to when to remove the sublimit.