Goodwill and Intangible Assets (Details) $ in Thousands		3 Months Ended
	Feb. 15, 2019 USD ($)	Mar. 31, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Goodwill and Intangible Assets [Abstract]
Number of reporting units | Segment		2
Number of operating segments | Segment		2
Goodwill [Roll Forward]
Net book value, beginning balance		$ 13,170
Acquisition		5,633
Dispositions		0
Goodwill impairment loss		(2,094)
Net book value, ending balance		16,709
Amortized Intangible Assets [Abstract]
Gross carrying amount		9,945		$ 9,945
Accumulated amortization		(4,374)		(3,865)
Addition		6,798
Impairment		(3,370)
Net		8,999		6,080
Impairment charge on definite-lived intangible assets		3,370
Amortization of definite-lived intangible assets		509	$ 150
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2019		1,536
2020		1,973
2021		1,470
2022		1,152
2023		868
Thereafter		2,000
Total		8,999		6,080
Fair value of contingent consideration		$ 1,200
Amortization term of intangible assets acquired		3 years
Customer Relationships [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount		$ 6,831		6,831
Accumulated amortization		(2,745)		(2,375)
Addition		4,898
Impairment		(3,370)
Net		5,614		4,456
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total		5,614		4,456
Trade Names [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount		1,295		1,295
Accumulated amortization		(405)		(318)
Addition		1,172
Impairment		0
Net		2,062		977
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total		2,062		977
Developed Technology [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount		471		471
Accumulated amortization		(471)		(471)
Net		0		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total		0		0
Non Contractual Customer Relationships [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount		433		433
Accumulated amortization		(433)		(433)
Net		0		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total		0		0
Noncompete Agreements [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount		221		221
Accumulated amortization		(61)		(35)
Addition		728
Impairment		0
Net		888		186
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total		888		186
Alliance Agreement [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount		527		527
Accumulated amortization		(92)		(66)
Net		435		461
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total		435		461
Others [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount		167		167
Accumulated amortization		(167)		(167)
Net		0		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total		0		$ 0
Performance Improvement Solutions [Member]
Goodwill [Roll Forward]
Net book value, beginning balance		4,739
Acquisition		5,633
Dispositions		0
Goodwill impairment loss		(2,094)
Net book value, ending balance		8,278
Nuclear Industry Training and Consulting [Member]
Goodwill [Roll Forward]
Net book value, beginning balance		8,431
Acquisition		0
Dispositions		0
Goodwill impairment loss		0
Net book value, ending balance		$ 8,431
DP Engineering Ltd, CO. [Member]
Goodwill [Roll Forward]
Net book value, ending balance	$ 5,633
Amortized Intangible Assets [Abstract]
Addition	$ 6,798
Period of suspension from obtaining new work	6 months
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Fair value of contingent consideration	$ 1,200
DP Engineering Ltd, CO. [Member] | Minimum [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization term of intangible assets acquired		5 years
DP Engineering Ltd, CO. [Member] | Maximum [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization term of intangible assets acquired		15 years
DP Engineering Ltd, CO. [Member] | Customer Relationships [Member]
Amortized Intangible Assets [Abstract]
Addition	4,898
DP Engineering Ltd, CO. [Member] | Noncompete Agreements [Member]
Amortized Intangible Assets [Abstract]
Addition	$ 728