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Consolidated Statements of Changes in (Deficit)/Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-In Capital [Member]
Warrants [Member]
Accumulated Deficit [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total Acorn Energy, Inc. Shareholders' Equity (Deficit) / Equity [Member]
Non-Controlling Interests [Member]
Total
Balances at Dec. 31, 2016 $ 301 $ 99,767 $ 1,600 $ (97,046) $ (3,036) $ (254) $ 1,332 $ 555 $ 1,887
Balances, shares at Dec. 31, 2016 30,125,000                
Net loss (1,169) (1,169) (174) (1,343)
Deconsolidation of GridSense (see Note 4) 254 254 254
Shares issued in lieu of director fees (see Note 15 (a)) $ 2 30 32 32
Shares issued in lieu of director fees, shares (see Note 15 (a)) 177,000                
Accrued dividend in OmniMetrix preferred shares (100) (100)
Stock option compensation 22 22 22
Balances at Dec. 31, 2017 $ 303 99,819 1,600 (98,215) (3,036) 471 281 752
Balances, shares at Dec. 31, 2017 30,302,000                
Net loss (2,001) (2,001) (86) (2,087)
Shares issued in lieu of director fees (see Note 15 (a)) $ 1 13 14 14
Shares issued in lieu of director fees, shares (see Note 15 (a)) 56,000                
Accrued dividend in OmniMetrix preferred shares (87) (87)
Stock option compensation 26 26 26
Adjustment of retained earnings in accordance with ASC 606 (see Note 17) 152 152 152
Value of expired warrants 482 (482)
Balances at Dec. 31, 2018 $ 304 $ 100,340 $ 1,118 $ (100,064) $ (3,036) $ (1,338) $ 108 $ (1,230)
Balances, shares at Dec. 31, 2018 30,358,000