Acquisition-Related Obligations (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Acquisition-Related Obligations

Acquisition-related obligations consisted of the following:

	March 31, 2020			December 31, 2019
Contingent Revenue Obligation	$	37,430		$	52,427
Environmental Settlement Obligations	14,241			16,305
Reclamation Funding Liability	12,000			12,000
UMWA Funds Settlement Liability	4,000			4,000
Discount	(3,742		)	(4,834		)
Total acquisition-related obligations	63,929			79,898
Less current portion	(33,211		)	(33,639		)
Acquisition-related obligations, net of current portion	$	30,718		$	46,259