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SEGMENT REPORTING (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
facility
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
facility
item
MW
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
SEGMENT REPORTING          
Revenues from external customers $ 65,225 $ 68,381 $ 116,276 $ 127,181  
Operating profit (loss) 1,861 2,101 (3,117) 1,106  
Depreciation and amortization 2,518 3,150 5,097 6,264  
Capital expenditures 764 2,342 1,604 4,542  
Total Assets $ 132,061   $ 132,061   $ 146,617
Towers and Weldments Segment          
SEGMENT REPORTING          
Number of facilities | facility 2   2    
Revenues from external customers $ 54,994 52,794 $ 95,792 100,928  
Intersegment revenues 37 97 268 257  
Operating profit (loss) 7,155 8,561 8,290 14,172  
Depreciation and amortization 915 1,007 1,829 1,991  
Capital expenditures 276 1,878 $ 787 3,111  
Towers and Weldments Segment | Maximum          
SEGMENT REPORTING          
Annual tower production capacity (in towers) | item     500    
Towers and Weldments Segment | Minimum          
SEGMENT REPORTING          
Power generating capacity of turbines that towers produced annually can support (in megawatts) | MW     1,000    
Gearing          
SEGMENT REPORTING          
Revenues from external customers 7,568 12,139 $ 15,999 20,414  
Intersegment revenues 398 285 574 784  
Operating profit (loss) (1,524) (1,800) (2,736) (4,765)  
Depreciation and amortization 1,244 1,805 2,541 3,606  
Capital expenditures 381 342 454 976  
Services          
SEGMENT REPORTING          
Revenues from external customers 2,663 3,448 4,485 5,839  
Intersegment revenues 23 34 139 81  
Operating profit (loss) (1,764) (1,319) (4,388) (2,658)  
Depreciation and amortization 315 306 637 619  
Capital expenditures 105 95 276 125  
Corporate          
SEGMENT REPORTING          
Operating profit (loss) (2,007) (3,386) (4,291) (5,638)  
Depreciation and amortization 44 32 90 48  
Capital expenditures 2 27 87 330  
Eliminations          
SEGMENT REPORTING          
Intersegment revenues (458) (416) (981) (1,122)  
Operating profit (loss) 1 $ 45 8 $ (5)  
Total Assets (275,974)   (275,974)   (263,688)
Operating segments          
SEGMENT REPORTING          
Total Assets 132,061   132,061   146,617
Operating segments | Towers and Weldments Segment          
SEGMENT REPORTING          
Total Assets 59,138   59,138   50,691
Operating segments | Gearing          
SEGMENT REPORTING          
Total Assets 45,325   45,325   50,238
Operating segments | Services          
SEGMENT REPORTING          
Total Assets 9,259   9,259   10,884
Operating segments | Assets held for sale          
SEGMENT REPORTING          
Total Assets 1,517   1,517   738
Operating segments | Corporate          
SEGMENT REPORTING          
Total Assets $ 292,796   $ 292,796   $ 297,754