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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Gross Goodwill:    
Balance, beginning $ 2,969 $ 2,969
No activity  
Balance, ending 2,969 2,969
Accumulated impairment losses:    
Impairment charges (2,969)  
Balance, ending (2,969)  
Net Goodwill   2,969
Critical Power Segment [Member]    
Gross Goodwill:    
Balance, beginning 2,969 2,969
No activity  
Balance, ending 2,969 2,969
Accumulated impairment losses:    
Impairment charges (2,969)  
Balance, ending $ (2,969)  
Net Goodwill   $ 2,969