Goodwill represents the excess of the purchase price over the fair value of net assets of acquired businesses and is not amortized. Goodwill and other intangible assets are tested for impairment at a reporting unit level. Historically, the Company has performed its annual impairment test as of November 30, the last day of the third quarter, but beginning in fiscal year 2020, the Company performed its annual impairment test as of December 1, the first day of the fourth quarter. Accordingly, the annual impairment test was performed as of November 30 and updated as of December 1 of fiscal year 2020, in each case with no impact on the financial statements. The change to the Company’s impairment testing date did not accelerate, delay, avoid or cause an impairment charge, nor

did the change result in adjustments to the Company’s previously issued financial statements. The Company’s impairment tests indicated significant cushion between its carrying value and fair market value.

Subsequent to the December 1, 2019 assessment, the novel coronavirus (COVID-19) pandemic began to cause major economic disruption and significant volatility in the stock market. As a result, the Company updated the assessment performed for fiscal year 2020 through February 29, 2020. No impairment charge to the Company’s recorded goodwill was deemed required as a result of this updated assessment. For the nine months ended November 30, 2020, given the continued economic impact of COVID-19, the Company reviewed the assumptions used in the previous assessment and found them to still be materially accurate.

The Company uses qualitative factors to determine whether it is more likely than not (likelihood of more than 50%) that the fair value of a reporting unit exceeds its carrying amount, including goodwill. Some of the qualitative factors used in applying this test include consideration of macroeconomic conditions, industry and market conditions, cost factors affecting the business, overall financial performance of the business, and performance of the share price of the Company.

If qualitative factors are not deemed sufficient to conclude that the fair value of the reporting unit more likely than not exceeds its carrying value, then a one-step approach is applied in making an evaluation. The evaluation utilizes multiple valuation methodologies, including a market approach (market price multiples of comparable companies) and an income approach (discounted cash flow analysis). The computations require management to make significant estimates and assumptions, including, among other things, selection of comparable publicly traded companies, the discount rate applied to future earnings reflecting a weighted average cost of capital, and earnings growth assumptions. A discounted cash flow analysis requires management to make various assumptions about future sales, operating margins, capital expenditures, working capital, and growth rates. If the evaluation results in the fair value of the goodwill for the reporting unit being lower than the carrying value, an impairment charge is recorded.

The carrying amount and accumulated amortization of the Company’s intangible assets at each balance sheet date are as follows (in thousands):

	Weighted
	Average
	Remaining		Gross
	Life		Carrying		Accumulated
As of November 30, 2020	(in years)		Amount		Amortization		Net
Amortized intangible assets
Trademarks and trade names		11.9	$	26,161	$	7,485	$	18,676
Customer lists		6.7		73,102		41,334		31,768
Non-compete		1.3		767		632		135
Patent		—		783		783		—
Total		8.6	$	100,813	$	50,234	$	50,579

As of February 29, 2020
Amortized intangible assets
Trademarks and trade names		12.6	$	26,161	$	5,811	$	20,350
Customer lists		7.4		73,102		37,161		35,941
Non-compete		1.8		767		501		266
Patent		—		783		783		—
Total		9.2	$	100,813	$	44,256	$	56,557

Aggregate amortization expense for the nine months ended November 30, 2020 and November 30, 2019 was $6.0 million and $5.8 million, respectively.

The Company’s estimated amortization expense for the current and next four fiscal years is as follows (in thousands):

Changes in the net carrying amount of goodwill as of the dates indicated are as follows (in thousands):

During the nine months ended November 30, 2019, $0.9 million was added to goodwill related to the acquisition of Integrated.