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Sales, Contract Assets and Contract Liabilities (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Contract with Customer, Asset, Net	$ 39,000		$ 39,000
Contract with Customer, Liability	0		0
Cost of Revenue	$ 9,000	$ 15,000	424,000	$ 266,000
Flare Projects [Member]
Revenue from Contract with Customer, Including Assessed Tax			360,000
Once Through Steam Generator [Member]
Revenue from Contract with Customer, Including Assessed Tax			128,000
Small project [Member]
Revenue from Contract with Customer, Including Assessed Tax			$ 42,000

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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