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Business Segments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Total revenues	$ 47,071	$ 37,342
Depreciation	9,271	8,822
Operating loss	(5,430)	(7,282)
Net equity income from foreign joint ventures' operations	1,133	0
Net loss	(5,508)	(11,086)
Assets	90,326	74,705
Brazil
Segment Reporting Information [Line Items]
Total revenues	3,421	0
Assets	3,276	0
China
Segment Reporting Information [Line Items]
Assets	11,167	0
Mexico
Segment Reporting Information [Line Items]
Total revenues	131	0
Assets	4,916	0
United States
Segment Reporting Information [Line Items]
Total revenues	43,519	37,342
Assets	70,967	74,705
LNG
Segment Reporting Information [Line Items]
Depreciation	9,127
Operating loss		(7,282)
Net equity income from foreign joint ventures' operations		0
Net loss	(6,194)	(11,086)
Assets	75,883	74,705
Power Delivery
Segment Reporting Information [Line Items]
Depreciation		0
Operating loss	(414)
Net equity income from foreign joint ventures' operations	1,133
Net loss	686	0
Assets	$ 14,443	$ 0
Bomay
Segment Reporting Information [Line Items]
Ownership percentage	40.00%

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