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SEGMENT INFORMATION (Schedule of Assets, Depreciation and Amortization, and Capital Expenditures by Segment) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
 [1]
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ 116,121 $ 114,675  
Depreciation and amortization 4,065 4,292 [1] $ 4,065
Expenditure for segment assets 11,040 3,822  
Discontinued Operation [Member]      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 2,227  
Depreciation and amortization  
Expenditure for segment assets  
OEM of Heat Transfer Solutions and Aviation Accessories [Member]      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 32,536 29,149  
Depreciation and amortization 1,400 1,601  
Expenditure for segment assets 765 1,600  
MRO Services for heat transfer components and OEM of heat transfer solutions [Member]      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 21,525 31,031  
Depreciation and amortization 1,020 1,031  
Expenditure for segment assets 556 1,180  
MRO services for Aviation Components [Member]      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 41,433 34,264  
Depreciation and amortization 799 786  
Expenditure for segment assets 9,410 803  
Overhaul and coating of jet engine components [Member]      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 6,073 7,967  
Depreciation and amortization 846 954  
Expenditure for segment assets 309 239  
Amounts not allocated to segments [Member]      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 14,554 10,037  
Depreciation and amortization  
Expenditure for segment assets  
[1] Reclassified due to discontinued operation.