Fixed Assets

9 Months Ended

12 Months Ended

Sep. 30, 2021

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Fixed assets are recorded at cost less accumulated depreciation and amortization and consist of the following as of September 30, 2021 and December 31, 2020:


	September 30, 2021		December 31, 2020
Leasehold improvements	$	48,996	$	49,718
Furniture and fixtures	8,107		8,606
Equipment	15,897		35,293
Software	8,577		14,395
Total	81,577		108,012
Less: Accumulated depreciation and amortization	(70,194)		(90,823)
Fixed assets, net	$	11,383	$	17,189

Depreciation expense related to fixed assets was $1.6 million and $5.2 million for the three and nine months ended September 30, 2021, respectively, and $1.8 million and $5.5 million for the three and nine months ended September 30, 2020, respectively. Amortization expense related to software development costs was $0.2 million and $0.9 million for the three and nine months ended September 30, 2021, respectively, and $0.4 million and $1.2 million for the three and nine months ended September 30, 2020, respectively.

During the three and nine months ended September 30, 2021, the Company disposed of certain obsolete assets, substantially all of which were fully depreciated.

Fixed Assets

Fixed assets are recorded at cost less accumulated depreciation and amortization and consist of the following as of December 31, 2020 and 2019:


	December 31,
	2020		2019
Leasehold improvements	$	49,718	$	48,265
Furniture and fixtures	8,606		8,189
Equipment	35,293		33,501
Software	14,395		13,538
Total	108,012		103,493
Less: Accumulated depreciation and amortization	(90,823)		(82,831)
Fixed assets, net	$	17,189	$	20,662

Depreciation expense related to fixed assets was $7.3 million, $7.8 million, and $7.6 million for the years ended December 31, 2020, 2019, and 2018, respectively. Amortization expense related to software development costs was $1.7 million, $1.5 million, and $2.1 million for the years ended December 31, 2020, 2019, and 2018, respectively.