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Asset Retirement Obligations
12 Months Ended
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations

5.  Asset Retirement Obligations

We own the land on which our owned plants operate, limiting asset retirement obligations at our owned chemical facilities. However, we have various legal requirements related to operations at our chemical facilities mainly for the disposal of wastewater generated at certain of these facilities.  At December 31, 2020 and 2019, our accrued liability for AROs was $100,000.  However, the facilities and some of the water related assets have an indeterminate life and as a result there is insufficient information to estimate the fair value for certain of our AROs.  We will continue to review these obligations and record a liability when a reasonable estimate of the fair value can be made.