XML 91 R75.htm IDEA: XBRL DOCUMENT v3.10.0.1
SEGMENT REPORTING - Summary of Major Customers (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
customer
Dec. 31, 2017
USD ($)
customer
SEGMENT REPORTING                    
Revenues from external customers $ 27,187 $ 31,445 $ 36,781 $ 29,967 $ 17,768 $ 29,595 $ 43,362 $ 56,060 $ 125,380 $ 146,785
Towers and Heavy Fabrications                    
SEGMENT REPORTING                    
Revenues from external customers                 $ 68,815  
Two customers | Customer concentration | Revenues                    
SEGMENT REPORTING                    
Number of major customers | customer                 2  
Two customers | Customer concentration | Revenues | Minimum                    
SEGMENT REPORTING                    
Concentration risk (as a percent)                 10.00%  
Two customers | Customer concentration | Revenues | Towers and Heavy Fabrications                    
SEGMENT REPORTING                    
Revenues from external customers                 $ 72,851  
Customer One | Customer concentration | Revenues                    
SEGMENT REPORTING                    
Number of major customers | customer                   1
Customer One | Customer concentration | Revenues | Minimum                    
SEGMENT REPORTING                    
Concentration risk (as a percent)                   10.00%
Customer One | Customer concentration | Revenues | Towers and Heavy Fabrications                    
SEGMENT REPORTING                    
Revenues from external customers                   $ 100,413
Five customers | Customer concentration | Revenues                    
SEGMENT REPORTING                    
Number of major customers | customer                 5 5
Concentration risk (as a percent)                 78.00% 85.00%