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Segment Information (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
Segment
Sep. 30, 2015
USD ($)
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]        
Number of reportable business segments | Segment     2  
Segment Reporting Information, Profit (Loss) [Abstract]        
Revenue $ 14,428 $ 14,809 $ 39,820 $ 42,476
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)
Performance Improvement Solutions [Member]        
Segment Reporting Information, Profit (Loss) [Abstract]        
Revenue 10,215 9,751 27,382 26,798
Operating income (loss) (412) (3,732) $ (890) (5,658)
Performance Improvement Solutions [Member] | Minimum [Member]        
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]        
Contract term     6 months  
Contract term for the majority of contracts     12 months  
Performance Improvement Solutions [Member] | Maximum [Member]        
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]        
Contract term     3 years  
Contract term for the majority of contracts     2 years  
Nuclear Industry Training and Consulting [Member]        
Segment Reporting Information, Profit (Loss) [Abstract]        
Revenue 4,213 5,058 $ 12,438 15,678
Operating income (loss) $ 321 $ 442 $ 1,395 $ 1,104
Nuclear Industry Training and Consulting [Member] | Minimum [Member]        
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]        
Contract term     6 months  
Nuclear Industry Training and Consulting [Member] | Maximum [Member]        
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]        
Contract term     3 years