Note 4 - Revenue From Contracts With Customers (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	As of December 31,
(in thousands)	2019		2018
Current contract liabilities	$	1,668	$	1,956
Long-term contract liabilities (1)		192		129
Total contract liabilities	$	1,860	$	2,085

	For the Six Months
	Ended June 30,
	2020			2019
Total contract liabilities - beginning of period	$	1,860		$	2,085
Contract liability additions acquired - Reach Construction		3,201			—
Contract additions, net		3,553			1,618
Revenue recognized		(1,741	)		(1,663	)
Translation		(95	)		(5	)
Total contract liabilities - end of period	$	6,778		$	2,035

	As of June 30,
	2020		2019
Current contract liabilities	$	6,616	$	1,876
Long-term contract liabilities (1)		162		159
Total contract liabilities	$	6,778	$	2,035

Disaggregation of Revenue [Table Text Block]

	For the Three Months						For the Three Months
	Ended June 30, 2020						Ended June 30, 2019
(in thousands)	Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total		Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total
Revenues recognized at point in time	$	1,526	$	—	$	1,526	$	1,311	$	—	$	1,311
Revenues recognized over time		2,221		4,028		6,249		4,950		—		4,950
Total revenues	$	3,747	$	4,028	$	7,775	$	6,261	$	—	$	6,261

	For the Six Months						For the Six Months
	Ended June 30, 2020						Ended June 30, 2019
(in thousands)	Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total		Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total
Revenues recognized at point in time	$	3,505	$	—	$	3,505	$	2,464	$	—	$	2,464
Revenues recognized over time		5,531		4,427		9,958		9,256		—		9,256
Total revenues	$	9,036	$	4,427	$	13,463	$	11,720	$	—	$	11,720

	For the Three Months						For the Three Months
	Ended June 30, 2020						Ended June 30, 2019
(in thousands)	Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total		Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total
North America	$	1,547	$	4,028	$	5,575	$	1,970	$	—	$	1,970
Europe		2,177		—		2,177		4,288		—		4,288
Asia		4		—		4		1		—		1
Other		19		—		19		2		—		2
Total revenues	$	3,747	$	4,028	$	7,775	$	6,261	$	—	$	6,261

	For the Six Months						For the Six Months
	Ended June 30, 2020						Ended June 30, 2019
(in thousands)	Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total		Integrated Energy Infrastructure Solutions and Services		Electric Power and Solar Infrastructure Services		Total
North America	$	4,390	$	4,427	$	8,817	$	3,794	$	—	$	3,794
Europe		4,503		—		4,503		7,852		—		7,852
Asia		20		—		20		20		—		20
Other		123		—		123		54		—		54
Total revenues	$	9,036	$	4,427	$	13,463	$	11,720	$	—	$	11,720