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Derivative Instruments (Details 1) - Energy contracts and options [Member] - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Asset Derivatives not designated or not qualifying as hedging instruments	$ 344	$ 327
Liability Derivatives not designated or not qualifying as hedging instruments	1,339	1,979
Other current assets [Member]
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Asset Derivatives not designated or not qualifying as hedging instruments	335	324
Other assets [Member]
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Asset Derivatives not designated or not qualifying as hedging instruments	9	3
Other current liabilities [Member]
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Liability Derivatives not designated or not qualifying as hedging instruments	1,297	1,909
Other liabilities [Member]
Schedule of fair value of outstanding derivative instruments recorded as assets and liability
Liability Derivatives not designated or not qualifying as hedging instruments	$ 42	$ 70

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
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Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
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