Commitments and Contingent Liabilities (Details)	Sep. 30, 2020 USD ($)
New Mexico Environment Department Notice of Violation 1 [Member]
Other Commitments [Line Items]
Estimated Litigation Liability	$ 150,000
New Mexico Environment Department Notice of Violation 2 [Member]
Other Commitments [Line Items]
Estimated Litigation Liability	142,000
New Mexico Environment Department Notice of Violation 3 [Domain]
Other Commitments [Line Items]
Estimated Litigation Liability	5,300,000
New Mexico Environment Department Notice of Violation 4 [Domain]
Other Commitments [Line Items]
Estimated Litigation Liability	3,300,000
Low end of estimate
Other Commitments [Line Items]
Estimated Litigation Liability	375,000
High end of estimate
Other Commitments [Line Items]
Estimated Litigation Liability	$ 460,000