Note 7 — Goodwill and Other Intangibles

The changes in the carrying value of goodwill were as follows:


	Adhesives, Sealants and Additives		Industrial Tapes		Corrosion Protection and Waterproofing		Consolidated
Balance at August 31, 2019	$	50,090	$	21,215	$	10,681	$	81,986
Foreign currency translation adjustment		55		—		3		58
Balance at May 31, 2020	$	50,145	$	21,215	$	10,684	$	82,044

The Company’s goodwill is allocated to each reporting unit based on the nature of the products manufactured by the respective business combinations that originally created the goodwill. The Company has identified a total of three reporting units, corresponding to its three operating segments that are used to evaluate the possible impairment of goodwill. Goodwill impairment exists when the carrying value of goodwill exceeds its fair value. Assessments of possible impairment of goodwill are made when events or changes in circumstances indicate that the carrying value of the asset may not be recoverable through future operations. Additionally, testing for possible impairment of recorded goodwill and certain intangible asset balances is required annually. The amount and timing of any impairment charges based on these assessments require the estimation of future cash flows and the fair market value of the related assets based on management’s best estimates of certain key factors, including future selling prices and volumes; operating, raw material and energy costs; and various other projected operating and economic factors, including the anticipated future impact of the coronavirus disease 2019 (COVID-19) pandemic. When testing, fair values of the reporting units and the related implied fair values of their respective goodwill are established using discounted cash flows. The Company evaluates the possible impairment of goodwill annually during the fourth quarter, and whenever events or circumstances indicate the carrying value of goodwill may not be recoverable.

During the three-month period ended February 28, 2019, the ordering patterns of the polyurethane dispersions reporting unit’s customers, especially those in the automotive industry, combined with a decrease in the reporting unit’s backlog of customer orders believed to be firm as of February 28, 2019, indicated that an impairment in the carrying value of the reporting unit might have occurred. The Company performed an impairment test on the indefinite-lived and long-lived assets related to the polyurethane dispersions reporting unit, now part of the Adhesives, Sealants and Additives operating segment and reporting unit (part of the former Industrial Materials segment during the second fiscal quarter of 2019), in accordance with ASC Topic 350, “Intangibles — Goodwill and Other” and ASC Topic 360, “Disclosure — Impairment or Disposal of Long-Lived Assets.” As a result of impairment testing, which included first testing long-lived assets other than goodwill for impairment under applicable guidance, the Company recorded a charge of $2,410 to loss on impairment of goodwill within the consolidated statement of operations during the quarter ended February 28, 2019. The polyurethane dispersions reporting unit’s fair value was determined based on the income approach (discounted cash flow method).

In fiscal 2017, the Company early adopted ASU No. 2017-04 “Intangibles - Goodwill and Other Topics (Topic 350): Simplifying the Test for Goodwill Impairment.” The Company assesses goodwill for impairment by comparing the fair value of the reporting unit to its carrying amount. If the fair value of a reporting unit is less than its carrying value, an impairment loss, limited to the amount of goodwill allocated to that reporting unit, is recorded.

Intangible assets subject to amortization consisted of the following as of May 31, 2020 and August 31, 2019:


	Weighted Average		Gross Carrying		Accumulated		Net Carrying
	Amortization Period		Value		Amortization		Value
May 31, 2020
Patents and agreements	14.6	years	$	1,760	$	1,702	$	58
Formulas and technology	7.8	years		10,177		8,823		1,354
Trade names	5.8	years		8,514		7,608		906
Customer lists and relationships	9.1	years		98,267		56,582		41,685
			$	118,718	$	74,715	$	44,003

August 31, 2019
Patents and agreements	14.6	years	$	1,760	$	1,693	$	67
Formulas and technology	7.8	years		10,164		7,969		2,195
Trade names	5.8	years		8,503		7,261		1,242
Customer lists and relationships	9.1	years		98,139		48,939		49,200
			$	118,566	$	65,862	$	52,704

Aggregate amortization expense related to intangible assets for the nine months ended May 31, 2020 and 2019 was $8,724 and $9,339 respectively. Estimated amortization expense for the remainder of fiscal year 2020 and for the next five years is as follows:


Years ending August 31,
2020 (remaining 3 months)	$	2,837
2021		11,031
2022		10,024
2023		6,768
2024		5,659
2025		5,552