Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS, NET - Expected Future Amortization Expenses (Details)

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GOODWILL AND INTANGIBLE ASSETS, NET - Expected Future Amortization Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Total $ 17,522 $ 18,453
Remainder of 2018 931  
2019 1,856  
2020 1,842  
2021 1,837  
2022 1,822  
2023 1,822  
Thereafter 7,412  
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total 12,639 13,201
Remainder of 2018 562  
2019 1,123  
2020 1,123  
2021 1,123  
2022 1,123  
2023 1,123  
Thereafter 6,462  
Non-compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total 23 33
Remainder of 2018 9  
2019 14  
2020 0  
2021 0  
2022 0  
2023 0  
Thereafter 0  
Licenses and Permits [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total 1,028 1,081
Remainder of 2018 53  
2019 106  
2020 106  
2021 101  
2022 86  
2023 86  
Thereafter 490  
Developed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total 3,832 $ 4,138
Remainder of 2018 307  
2019 613  
2020 613  
2021 613  
2022 613  
2023 613  
Thereafter $ 460