GOODWILL AND INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in goodwill for the six months ended June 30, 2020 and for the year ended December 31, 2019 were as follows:


	June 30, 2020		December 31, 2019
Balance, beginning of period	$	6,619	$	6,563
Goodwill acquired during the period	170		43
Adjustments to goodwill	—		13



Balance, end of period	$	6,789	$	6,619

Principally all of the Company’s goodwill as of June 30, 2020 and December 31, 2019 was associated with its DIS business.

For the six months ended June 30, 2020, goodwill acquired during the period was primarily associated with the acquisitions of Blueprint Genetics and Memorial Hermann (see Note 5). For the year ended December 31, 2019, goodwill acquired was principally associated with the acquisitions of certain assets of the clinical laboratory services business of Boyce & Bynum Pathology Laboratories, P.C. and adjustments to goodwill primarily related to the finalization of the purchase price allocation for the acquisition of the U.S. laboratory services business of Oxford Immunotec, Inc. (see Note 6 to the audited consolidated financial statements in the Company's 2019 Annual Report on Form 10-K).

Intangible assets at June 30, 2020 and December 31, 2019 consisted of the following:


	Weighted Average Amortization Period (in years)	June 30, 2020															December 31, 2019
				Cost			Accumulated Amortization			Net			Cost			Accumulated Amortization			Net
Amortizing intangible assets:
Customer-related	17	$	1,403		$	(596)		$	807		$	1,367		$	(556)		$	811
Non-compete agreements	9	3			(2)			1			3			(2)			1
Technology	15	138			(60)			78			104			(56)			48
Other	9	110			(91)			19			110			(85)			25
Total	17	1,654			(749)			905			1,584			(699)			885

Intangible assets not subject to amortization:
Trade names		235			—			235			235			—			235

Other		1			—			1			1			—			1
Total intangible assets		$	1,890		$	(749)		$	1,141		$	1,820		$	(699)		$	1,121

The estimated amortization expense related to amortizable intangible assets for each of the five succeeding fiscal years and thereafter as of June 30, 2020 is as follows:


Year Ending December 31,
Remainder of 2020	$	51
2021	96
2022	93
2023	91
2024	88
2025	86
Thereafter	400
Total	$	905