Discontinued Operations - Schedule of Current and Long Term Accrued Environmental Liability (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current Accrual	$ 744,000	$ 817,000
Long-term Accrual	110,000
Total	854,000	$ 927,000
PFD [Member]
Current Accrual	17,000
Long-term Accrual	60,000
Total	77,000
PFM [Member]
Current Accrual	50,000
Long-term Accrual	15,000
Total	65,000
PFSG [Member]
Current Accrual	677,000
Long-term Accrual	35,000
Total	$ 712,000