Discontinued Operations - Schedule of Current and Long Term Accrued Environmental Liability (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Current Accrual	$ 632
Long-term Accrual	239
Total	871
PFD [Member]
Current Accrual	25
Long-term Accrual	60
Total	85
PFM [Member]
Current Accrual
Long-term Accrual	15
Total	15
PFSG [Member]
Current Accrual	607
Long-term Accrual	164
Total	$ 771