Intangible Assets

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets, all of which are finite-lived, consists of the following (in thousands):

September 30, 2021	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Value
Acquired technology	8 years	$	4,910	$	(112)	$	4,798
Customer relationships	3 years	40		(2)		38
Software development costs	2 years	18,392		(6,126)		12,266
		$	23,342	$	(6,240)	$	17,102

December 31, 2020	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Value
Acquired technology		$	—	$	—	$	—
Customer relationships		—		—		—
Software development costs	2 years	12,253		(4,833)		7,420
		$	12,253	$	(4,833)	$	7,420

Amortization expense was $0.5 million and $1.4 million for the three and nine months ended September 30, 2021, respectively; and $0.4 million and $1.3 million for the three and nine months ended September 30, 2020, respectively.