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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Segment | Dec. 31, 2017 USD ($) Segment
Property, Plant and Equipment [Line Items] |  |
Allowance for doubtful accounts | $ 200 | $ 500
Number of reporting units with goodwill | 2 |
Aggregate number of reporting units | 4 |
Number of reportable segments | Segment | 2 | 2
Impairment of goodwill |  | $ 1,445
Impairment charges | $ 1,350 |
Increase (decrease) in retained earnings | 100 |
Increase (decrease) in assets | 5,300 |
Increase (decrease) in liabilities | 5,200 |
Non Complete Agreements [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Impairment charges | 103 |
Technology Related Industry [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Impairment charges | 870 |
Customer Relationships [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Impairment charges | $ 377 |
Furniture and Fixtures [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 5 years |
Furniture and Fixtures [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 7 years |
Building [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 25 years |
Machinery and Equipment [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 5 years |
Machinery and Equipment [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 15 years |
Computer Equipment [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 3 years |
Computer Equipment [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 5 years |
T and D Segment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Impairment of goodwill |  | 1,445
Impairment charges | $ 1,350 |
Allocated goodwill | 5,600 |
Critical Power Segment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Impairment of goodwill |  |
Allocated goodwill | $ 3,000 |

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