Software (Tables)

9 Months Ended

Sep. 30, 2020

Schedule of Carrying Amount and Amortization of Software and Intangible Assets

The useful life, gross carrying value, accumulated amortization, and net balance for each major class of definite-lived intangible assets at each balance sheet date were as follows (in thousands):

		December 31, 2019							September 30, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)		(unaudited)			(unaudited)
Unpatented technology	3 - 7 years	$	14,660	$	(14,195	)	$	465	$	14,660	$	(14,330	)	$	330
Customer relationships	5 - 18 years		19,300		(5,631	)		13,669		19,300		(6,754	)		12,546
Patents	7 years		11,300		(11,300	)		—		11,300		(11,300	)		—
Trademarks	10 years		5,270		(4,304	)		966		5,270		(4,700	)		570
Total		$	50,530	$	(35,430	)	$	15,100	$	50,530	$	(37,084	)	$	13,446

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized intangible assets as of September 30, 2020, estimated amortization expense amounts in future fiscal years are as follows (unaudited and in thousands):

Year ending December 31,	Amortization
2020 (October - December)	$	552
2021		2,118
2022		1,603
2023		1,498
2024		1,498
Thereafter		6,177
Total amortization	$	13,446

Capitalized Software Assets

Schedule of Carrying Amount and Amortization of Software and Intangible Assets

Software consisted of the following (in thousands):

		December 31, 2019							September 30, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)		(unaudited)			(unaudited)
Acquired and Software for internal use	3 to 7 years	$	15,870	$	(13,471	)	$	2,399	$	15,678	$	(14,032	)	$	1,646
Software marketed for external sale	3 years		1,805		(809	)		996		2,675		(1,276	)		1,399
Total		$	17,675	$	(14,280	)	$	3,395	$	18,353	$	(15,308	)	$	3,045

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized software assets at September 30, 2020, estimated amortization expense in future fiscal years is as follows (unaudited and in thousands):

Year ending December 31,	Acquired and internal use software		Software marketed for external use		Total
2020 (October - December)	$	180	$	184	$	364
2021		683		555		1,238
2022		411		395		806
2023		162		234		396
2024		68		31		99
Thereafter		142		—		142
Total amortization	$	1,646	$	1,399	$	3,045