Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Goodwill and Intangible Assets [Abstract]
Loss on impairment	$ 0	$ 4,302
Goodwill [Roll Forward]
Goodwill	13,339		$ 13,339
Amortized Intangible Assets [Abstract]
Gross carrying amount	12,442		16,744
Accumulated amortization	(8,549)		(8,208)
Impact of Impairment			(4,302)
Total	3,893		4,234
Amortization of intangible assets	340	$ 670
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2021	874
2022	910
2023	640
2024	435
2025	334
Thereafter	700
Total	3,893		4,234
Customer Relationships [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount	8,628		11,730
Accumulated amortization	(5,772)		(5,504)
Impact of Impairment			(3,102)
Total	2,856		3,124
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	2,856		3,124
Trade Names [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount	1,689		2,467
Accumulated amortization	(1,042)		(1,020)
Impact of Impairment			(778)
Total	647		669
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	647		669
Developed Technology [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount	471		471
Accumulated amortization	(471)		(471)
Impact of Impairment			0
Total	0		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	0		0
Non-Controlling Customer Relationships [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount	433		433
Accumulated amortization	(433)		(433)
Impact of Impairment			0
Total	0		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	0		0
Noncompete Agreement [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount	527		949
Accumulated amortization	(360)		(336)
Impact of Impairment			(422)
Total	167		191
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	167		191
Alliance Agreement [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount	527		527
Accumulated amortization	(304)		(277)
Impact of Impairment			0
Total	223		250
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	223		250
Others [Member]
Amortized Intangible Assets [Abstract]
Gross carrying amount	167		167
Accumulated amortization	(167)		(167)
Impact of Impairment			0
Total	0		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	0		0
Performance Improvement Solutions [Member]
Goodwill [Roll Forward]
Goodwill	4,908		4,908
Nuclear Industry Training and Consulting [Member]
Goodwill [Roll Forward]
Goodwill	$ 8,431		$ 8,431