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SEGMENT INFORMATION (Schedule of Operating Income By Segment) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues $ 106,527 $ 95,794 $ 85,607
Cost of revenues 86,083 76,757 71,942
Gross profit 20,444 19,037 13,665
Research and development 731 1,140 890
Selling and marketing 4,974 3,876 2,903
General and administrative 9,409 10,023 8,469
Other expenses (income) 53 (138) 631
Gain on bargain purchase   (4,833)
Operating income 5,277 4,136 5,605
Financial expense, net 338 154 349
Income before taxes on income 4,939 3,982 5,256
Sale of Products and Services [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 106,527 95,794 85,607
Intersegment Revenues [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues
Elimination of inter-company sales [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues (5,729) (4,315)
Cost of revenues (3,620) (5,744) (4,445)
Gross profit 84 15 130
Research and development
Selling and marketing
General and administrative
Other expenses (income)
Gain on bargain purchase    
Operating income 84 15 130
Elimination of inter-company sales [Member] | Sale of Products and Services [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues
Elimination of inter-company sales [Member] | Intersegment Revenues [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues (3,536) (5,729) (4,315)
OEM of Heat Transfer Solutions and Aviation Accessories [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 31,237 28,255 27,351
Cost of revenues 25,535 24,028 23,887
Gross profit 5,702 4,227 3,464
Research and development 398 758 619
Selling and marketing 1,968 1,544 1,270
General and administrative 2,072 2,539 1,880
Other expenses (income)
Gain on bargain purchase    
Operating income 1,264 (614) (305)
OEM of Heat Transfer Solutions and Aviation Accessories [Member] | Sale of Products and Services [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 27,898 23,515 23,511
OEM of Heat Transfer Solutions and Aviation Accessories [Member] | Intersegment Revenues [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 3,339 4,740 3,840
MRO Services for heat transfer components and OEM of heat transfer solutions [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 34,812 32,429 31,001
Cost of revenues 26,085 23,440 22,541
Gross profit 8,727 8,989 8,460
Research and development 169 210 264
Selling and marketing 1,358 1,105 961
General and administrative 3,182 2,915 3,000
Other expenses (income)
Gain on bargain purchase    
Operating income 4,018 4,759 4,235
MRO Services for heat transfer components and OEM of heat transfer solutions [Member] | Sale of Products and Services [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 34,615 31,440 30,526
MRO Services for heat transfer components and OEM of heat transfer solutions [Member] | Intersegment Revenues [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 197 989 475
MRO services for Aviation Components [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 33,009 31,630 29,665
Cost of revenues 29,026 27,423 28,474
Gross profit 3,983 4,207 1,191
Research and development   29
Selling and marketing 1,213 792 608
General and administrative 3,049 3,473 3,303
Other expenses (income) 53
Gain on bargain purchase    
Operating income (332) (87) (2,720)
MRO services for Aviation Components [Member] | Sale of Products and Services [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 33,009 31,630 29,665
MRO services for Aviation Components [Member] | Intersegment Revenues [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues
Overhaul and coating of jet engine components [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 11,005 9,209 1,905
Cost of revenues 9,057 7,610 1,485
Gross profit 1,948 1,599 420
Research and development 164 143 7
Selling and marketing 435 435 64
General and administrative 1,106 1,096 286
Other expenses (income)
Gain on bargain purchase    
Operating income 243 (75) 63
Overhaul and coating of jet engine components [Member] | Sale of Products and Services [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues 11,005 9,209 1,905
Overhaul and coating of jet engine components [Member] | Intersegment Revenues [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues
Other [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues    
Cost of revenues  
Gross profit  
Research and development  
Selling and marketing  
General and administrative  
Other expenses (income)   (138) 631
Gain on bargain purchase     (4,833)
Operating income   138 (4,202)
Other [Member] | Sale of Products and Services [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues  
Other [Member] | Intersegment Revenues [Member]      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Revenues