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Segment Information (Tables)
 9 Months Ended
Sep. 30, 2016
Segment Information [Abstract]  
Reconciliation of Revenue and Operating Results to Consolidated Income (Loss) Before Income Tax Expense
The following table sets forth the revenue and operating results attributable to each reportable segment and includes a reconciliation of segment revenue to consolidated revenue and operating results to consolidated income (loss) before income tax expense:

(in thousands)
 
 
Three months ended
September 30,
  
Nine months ended
September 30,
 
  
2016
  
2015
  
2016
  
2015
 
             
Revenue:
            
Performance Improvement Solutions
 
$
10,215
  
$
9,751
  
$
27,382
  
$
26,798
 
Nuclear Industry Training and Consulting
  
4,213
   
5,058
   
12,438
   
15,678
 
  
$
14,428
  
$
14,809
  
$
39,820
  
$
42,476
 
                 
Operating income (loss):
                
Performance Improvement Solutions
 
$
(412
)
 
$
(3,732
)
 
$
(890
)
 
$
(5,658
)
Nuclear Industry Training and Consulting
  
321
   
442
   
1,395
   
1,104
 
Gain (loss) on change in fair value of contingent consideration, net
  
524
   
(306
)
  
370
   
(739
)
                 
Operating income (loss)
 
$
433
  
$
(3,596
)
 
$
875
  
$
(5,293
)
                 
Interest income, net
  
11
   
19
   
52
   
67
 
(Loss) gain on derivative instruments, net
  
(211
)
  
20
   
(346
)
  
(59
)
Other income (expense), net
  
15
   
(156
)
  
112
   
(235
)
Income (loss) before income taxes
 
$
248
  
$
(3,713
)
 
$
693
  
$
(5,520
)