Balance Sheet Components

12 Months Ended

Dec. 31, 2021

Inventory Disclosure [Abstract]

Balance Sheet Components

Balance Sheet Components

Inventory

Inventory consisted of the following as of the periods presented (in thousands):

	December 31, 2021		December 31, 2020
Raw materials	$	19,726	$	11,112
Work in process	21,382		18,333
Finished goods	10,449		3,856
Total inventory	$	51,557	$	33,301

Property and equipment

Property and equipment consisted of the following as of the periods presented (in thousands):

	December 31, 2021		December 31, 2020
Land	$	—	$	818
Buildings	—		2,129
Buildings capitalized under lease finance obligations	—		61,202
Leasehold improvements	18,162		1,637
Furniture, fixtures, and equipment	31,065		23,157
Software	2,713		2,632
Total	51,940		91,575
Less accumulated depreciation	(12,532)		(10,647)
Total	39,408		80,928
Construction in-progress	6,924		20,377
Total property and equipment, net	$	46,332	$	101,305

Depreciation expense totaled approximately $6.4 million, $5.6 million, and $3.8 million for the years ended December 31, 2021, 2020, and 2019, respectively.

Accrued expenses and other current liabilities

Accrued expenses consisted of the following as of the periods presented (in thousands):

	December 31, 2021		December 31, 2020
Employee related	$	18,894	$	18,448
Lease liabilities, current portion	3,722		—
Professional services	2,897		7,670
Customer deposits	2,429		1,091
Sales and use tax liability	1,296		2,896
Federal tax liability	102		2,290
Other	5,234		6,151
Total accrued expenses and other current liabilities	$	34,574	$	38,546