Goodwill and Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Other Intangibles [Abstract]

Schedule of goodwill

	GRE		GRE International		GES		Total
	(in thousands)
Balance at January 1, 2018	$	9,998	$	—	$	—	$	9,998
Acquisition of Prism (see Note 2)		—		—		1,084		1,084
Balance at December 31, 2018		9,998		—		1,084		11,082
Acquisition of Lumo (see Note 2)		—		1,744		—		1,744
Prism acquisition purchase price allocation adjustment (see Note 2)		—		—		(280)		(280)
Impairment of Prism goodwill		—		—		(400)		(400)
Cumulative translation adjustment		—		(11)		—		(11)
Balance at December 31, 2019	$	9,998	$	1,733	$	404	$	12,135

Schedule of other intangible assets

	Weighted Average Amortization Period		Gross Carrying Amount		Accumulated Amortization			Net Balance
December 31, 2019	(in thousands)
Patents and trademarks		17.1 years	$	3,842	$	(560)		$	3,282
Non-compete agreement		1.6 years		148		(126)			22
Customer relationships		3.9 years		6,706		(3,941)			2,765
Licenses		10.0 years		895		(127)			768
TOTAL			$	11,591	$	(4,754)		$	6,837
December 31, 2018
Trademark		17.3 years	$	3,470	$	(288	)	$	3,182
Non-compete agreement		2.0 years		115		(112	)		3
Customer relationships		4.0 years		4,612		(2,334	)		2,278
Licenses		10.0 years		895		(37)			858
TOTAL			$	9,092	$	(2,771	)	$	6,321