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Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

7. Goodwill and Intangible Assets

The changes in the carrying amount of goodwill for the year ended December 31, 2020 were as follows (in thousands):


			Software and
	TASER		Sensors		Total
Balance, December 31, 2019	$	1,354	$	23,659	$	25,013
Foreign currency translation adjustments		96		96		192
Balance, December 31, 2020	$	1,450	$	23,755	$	25,205

Intangible assets (other than goodwill) consisted of the following (in thousands):


		December 31, 2020						December 31, 2019
		Gross				Net		Gross				Net
	Useful	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Life	Amount		Amortization		Amount		Amount		Amortization		Amount
Amortizable (definite-lived) intangible assets:
Domain names	5 ‑ 10 years	$	3,036	$	(1,339)	$	1,697	$	3,161	$	(1,035)	$	2,126
Issued patents	5 ‑ 25 years		3,232		(1,567)		1,665		3,271		(1,339)		1,932
Issued trademarks	3 ‑ 15 years		1,002		(227)		775		1,166		(678)		488
Customer relationships	4 ‑ 8 years		3,780		(1,955)		1,825		3,721		(1,416)		2,305
Non-compete agreements	3 ‑ 4 years		460		(429)		31		450		(404)		46
Developed technology	3 ‑ 5 years		10,660		(8,713)		1,947		10,660		(6,528)		4,132
Re-acquired distribution rights	2 years		2,202		(2,202)		—		2,009		(2,009)		—
Total amortizable			24,372		(16,432)		7,940		24,438		(13,409)		11,029
Non-amortizable (indefinite-lived) intangible assets:
TASER trademark			900				900		900				900
Patents and trademarks pending			608				608		842				842
Total non-amortizable			1,508				1,508		1,742				1,742
Total intangible assets		$	25,880	$	(16,432)	$	9,448	$	26,180	$	(13,409)	$	12,771

Amortization expense of intangible assets was $3.3 million, $3.5 million and $5.7 million for the years ended December 31, 2020, 2019 and 2018, respectively. Estimated amortization for intangible assets with definitive lives for the next five years ended December 31, and thereafter, is as follows (in thousands):


2021	$	2,894
2022		1,285
2023		983
2024		900
2025		635
Thereafter		1,243
Total	$	7,940