Annual report pursuant to Section 13 and 15(d)

Accrued Closure Costs and ARO - Schedule of Asset Retirement Obligations (Details)

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Accrued Closure Costs and ARO - Schedule of Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Asset Retirement Obligation Disclosure [Abstract]    
Balance at beginning $ 3,730 $ 3,921
Amortization of closure and post-closure asset (191) (191)
Balance at end $ 3,539 $ 3,730