Annual report pursuant to Section 13 and 15(d)

Discontinued Operations - Schedule of Current and Long Term Accrued Environmental Liability (Details)

v3.20.1
Discontinued Operations - Schedule of Current and Long Term Accrued Environmental Liability (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Current Accrual $ 817,000  
Long-term Accrual 110,000  
Total 927,000 $ 887,000
PFD [Member]    
Current Accrual 41,000  
Long-term Accrual 60,000  
Total 101,000  
PFM [Member]    
Current Accrual 50,000  
Long-term Accrual 15,000  
Total 65,000  
PFSG [Member]    
Current Accrual 726,000  
Long-term Accrual 35,000  
Total $ 761,000