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GOODWILL AND INTANGIBLE ASSETS, NET
6 Months Ended
Jun. 30, 2016
GOODWILL AND INTANGIBLE ASSETS, NET [Abstract]  
GOODWILL AND INTANGIBLE ASSETS, NET
7. GOODWILL AND INTANGIBLE ASSETS, NET

Goodwill and intangible assets were recorded in relation to the acquisition of TC on October 1, 2014.

Intangible Assets

The following tables summarize the gross carrying amounts and accumulated amortization of intangible assets by major class (in thousands):

  
June 30, 2016
 
Intangible assets subject to amortization (Definite-lived)
 
Gross
  
Accumulated
Amortization
  
Net
 
Customer relationships
 
$
16,852
  
$
(1,967
)
 
$
14,885
 
Non-compete agreements
  
94
   
(33
)
  
61
 
Licenses and permits
  
1,471
   
(225
)
  
1,246
 
Developed technology
  
6,131
   
(1,073
)
  
5,058
 
   
24,548
   
(3,298
)
  
21,250
 
Intangible assets not subject to amortization (Indefinite-lived)
            
Emissions Allowance
  
197
   
-
   
197
 
Trade name
  
2,158
   
-
   
2,158
 
Total
 
$
26,903
  
$
(3,298
)
 
$
23,605
 

  
December 31, 2015
 
Intangible assets subject to amortization (Definite-lived)
 
Gross
  
Accumulated
Amortization
  
Net
 
Customer relationships
 
$
16,852
  
$
(1,404
)
 
$
15,448
 
Non-compete agreements
  
94
   
(24
)
  
70
 
Licenses and permits
  
1,471
   
(160
)
  
1,311
 
Developed technology
  
6,131
   
(766
)
  
5,365
 
   
24,548
   
(2,354
)
  
22,194
 
Intangible assets not subject to amortization (Indefinite-lived)
            
Emissions Allowance
  
197
   
-
   
197
 
Trade name
  
2,158
   
-
   
2,158
 
Total
 
$
26,903
  
$
(2,354
)
 
$
24,549
 

Amortization expense for intangible assets included in cost of sales for the three months ended June 30, 2016, and 2015, was approximately $474,000 and $471,000, respectively and for the six months ended June 30, 2016, and 2015, was approximately $944,000 and $942,000, respectively.

Based on identified intangible assets that are subject to amortization as of June 30, 2016, we expect future amortization expenses for each period to be as follows (in thousands):

  
Remainder of
2016
  
2017
  
2018
  
2019
  
2020
  
Thereafter
 
Customer relationships
 
$
560
  
$
1,123
  
$
1,123
  
$
1,123
  
$
1,123
  
$
9,833
 
Non-compete agreements
  
10
   
19
   
19
   
13
   
-
   
-
 
Licenses and permits
  
63
   
106
   
105
   
106
   
106
   
760
 
Developed technology
  
306
   
613
   
613
   
613
   
613
   
2,300
 
Total future amortization expense
 
$
939
  
$
1,861
  
$
1,860
  
$
1,855
  
$
1,842
  
$
12,893