On July 17, 2017, Comstock Environmental, an entity wholly owned by CDS Capital Management, L.C., a subsidiary of Comstock, purchased all of the business assets of Monridge Environmental, LLC for $2.3 million. Comstock Environmental has its principal office located in Conshohocken, Pennsylvania, and operates in Maryland, Pennsylvania, New Jersey, and Delaware. Comstock Environmental operates as an environmental services company, providing consulting, remediation, and other environmental services.

Goodwill represents the excess of the acquisition purchase price over the fair value of assets acquired and liabilities assumed, and it is not deductible for income tax purposes. As of the acquisition date, goodwill consisted primarily of synergies resulting from the combination, expected expanded opportunities for growth and production, and savings in corporate overhead costs. As of June 30, 2019 and December 31, 2018, the balance of goodwill was $1.7 million.

Intangible assets are comprised of customer relationships which have an amortization period of four years. During the three and six months ended June 30, 2019 and June 30, 2018, $17 thousand and $34 thousand of intangible asset amortization, respectively, was recorded in ‘General and administrative’ expense on the Consolidation Statements of Operations.

	June 30,			December 31,
	2019			2018
Intangibles		268			268
Less: accumulated amortization		(132	)		(98	)
	$	136		$	170

As of June 30, 2019, the future estimated amortization expense related to these intangible assets was:

	Amortization
	Expense
2019 (6 months ended December 31, 2019)	$	33
2020		67
2021		36
Total	$	136