		Gross										Accumulated Amortization						Net
	Useful Life	Feb. 29, 2020		Additions & Adjustments, net (1)			Impair- ment			May 31, 2020		Feb. 29, 2020		Expense		May 31, 2020		Feb. 29, 2020		May 31, 2020
Developed technology	2-7 years	$	27,363		(52	)		—		$	27,311	$	21,437	$	754	$	22,191	$	5,926	$	5,121
Tradenames	10 years		30,093		(74	)		—			30,019		16,303		529		16,832		13,790		13,187
Customer lists	4-7 years		25,304		—			—			25,304		22,903		48		22,951		2,401		2,353
Dealer and customer relationships	7-12 years		34,139		(787	)		(365	)		32,987		10,753		552		11,305		23,386		21,682
Patents	5 years		589		—			—			589		197		9		206		392		383
		$	117,488	$	(913	)	$	(365	)	$	116,210	$	71,593	$	1,892	$	73,485	$	45,895	$	42,725

(1)	Amounts also include any net changes in intangible asset balances for the periods presented that resulted from foreign currency translations.

Intangible assets with finite lives are amortized on a straight-line basis over the expected period to be benefited by future cash flows. We monitor and assess these assets for impairment on a periodic basis. Our assessment includes various new product lines and services, which leverage the existing intangible assets as well as consideration of historical and projected revenues and cash flows. In the first quarter of fiscal 2021, we determined that the prolonged secular decline in legacy LoJack U.S. SVR products revenue coupled with the slower than anticipated market penetration of our telematics solutions in the U.S. automotive dealership channel represented determinate indications of impairment. As a result, we performed an assessment of the carrying amount of the related intangible assets supporting these products. Our assessment of the future cash flows generates by these assets concluded that an impairment loss was present. We recorded an impairment loss of $0.4 million for U.S. dealer relationships during the quarter ended May 31, 2020.

Estimated future amortization expense as of May 31, 2020 is as follows (in thousands):

	Software & Subscription Services			Telematics Products		LoJack U.S. SVR Products			Total
Balance as of February 29, 2020	$	55,132		$	39,180	$	12,023		$	106,335
Impairment loss		—			—		(3,924	)		(3,924	)
Effect of exchange rate change on goodwill		(992	)		—		—			(992	)
Balance as of May 31, 2020	$	54,140		$	39,180	$	8,099		$	101,419

There was no impairment of goodwill for fiscal 2020. The fair value of the LoJack US SVR reporting unit exceeds its carrying amount of $12 million by approximately 8% as of February 29, 2020. As the COVID-19 pandemic continues to impact the market and our business operations, we reevaluated the carrying amount of goodwill during the first quarter of fiscal 2021. Based upon our assessment of economic conditions, our expectations of future business conditions and trends, our projected revenues, earnings, and cash flows, we determined that goodwill utilized in our LoJack U.S. SVR reporting unit was impaired as of May 31, 2020. As a result, we recorded an impairment loss of $3.9 million for goodwill during the first quarter of fiscal 2021. Any deterioration in future operating cash flows of this reporting unit may result in further impairment of goodwill and other long-lived assets, including intangible assets