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Concentration of Risks (Details) - Customer Concentration Risk - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue
Concentration Risk [Line Items]
Revenue	$ 9,270	$ 14,161
Concentration risk, percentage	20.00%	38.00%
Revenue | LNG
Concentration Risk [Line Items]
Revenue	$ 13,476	$ 14,161
Concentration risk, percentage	31.00%	38.00%
Revenue | Power Delivery
Concentration Risk [Line Items]
Revenue	$ 879	$ 0
Concentration risk, percentage	26.00%	0.00%
Revenue | Customer 1
Concentration Risk [Line Items]
Revenue	$ 9,270	$ 9,710
Concentration risk, percentage	20.00%	26.00%
Revenue | Customer 1 | LNG
Concentration Risk [Line Items]
Revenue	$ 9,270	$ 9,710
Concentration risk, percentage	21.00%	26.00%
Revenue | Customer 1 | Power Delivery
Concentration Risk [Line Items]
Revenue	$ 472	$ 0
Concentration risk, percentage	14.00%	0.00%
Revenue | Customer 2
Concentration Risk [Line Items]
Revenue		$ 4,451
Concentration risk, percentage		12.00%
Revenue | Customer 2 | LNG
Concentration Risk [Line Items]
Revenue	$ 4,206	$ 4,451
Concentration risk, percentage	10.00%	12.00%
Revenue | Customer 2 | Power Delivery
Concentration Risk [Line Items]
Revenue	$ 407	$ 0
Concentration risk, percentage	12.00%	0.00%
Accounts Receivable
Concentration Risk [Line Items]
Accounts Receivable	$ 1,172	$ 1,111
Concentration risk, percentage	19.00%	26.00%
Accounts Receivable | LNG
Concentration Risk [Line Items]
Accounts Receivable	$ 1,172	$ 1,111
Concentration risk, percentage	23.00%	26.00%
Accounts Receivable | Power Delivery
Concentration Risk [Line Items]
Accounts Receivable	$ 154	$ 0
Concentration risk, percentage	17.00%	0.00%
Accounts Receivable | Customer 1
Concentration Risk [Line Items]
Accounts Receivable	$ 1,172	$ 998
Concentration risk, percentage	19.00%	23.00%
Accounts Receivable | Customer 1 | LNG
Concentration Risk [Line Items]
Accounts Receivable	$ 1,172	$ 998
Concentration risk, percentage	23.00%	23.00%
Accounts Receivable | Customer 1 | Power Delivery
Concentration Risk [Line Items]
Accounts Receivable	$ 51	$ 0
Concentration risk, percentage	6.00%	0.00%
Accounts Receivable | Customer 2
Concentration Risk [Line Items]
Accounts Receivable		$ 113
Concentration risk, percentage		3.00%
Accounts Receivable | Customer 2 | LNG
Concentration Risk [Line Items]
Accounts Receivable	$ 0	$ 113
Concentration risk, percentage	0.00%	3.00%
Accounts Receivable | Customer 2 | Power Delivery
Concentration Risk [Line Items]
Accounts Receivable	$ 103	$ 0
Concentration risk, percentage	11.00%	0.00%

X

- Definition

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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