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Asset Retirement Obligations
12 Months Ended
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations

6.  Asset Retirement Obligations

Currently, 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, 2019 and 2018, 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.