Inventory and other deferred costs consist of the following (in thousands):


	December 31,
	2023		2022
Raw materials	$	5,661	$	6,384
Other deferred costs		4,813		2,207
Total inventory and other deferred costs	$	10,474	$	8,591

Property and equipment, net consists of the following (in thousands):


	December 31,
	2023			2022
Machinery and equipment	$	27,809		$	21,537
Computer equipment		17,923			17,803
Computer software		2,961			3,010
Furniture and fixtures		2,045			2,152
Construction in progress		3,485			3,989
Leasehold improvements		40,811			40,370
Total		95,034			88,861
Less: accumulated depreciation and amortization		(37,668	)		(26,926	)
Property and equipment, net	$	57,366		$	61,935

Depreciation and amortization expense for the years ended December 31, 2023, 2022, and 2021 was $11.3 million, $8.4 million, and $6.0 million, respectively.

Restricted cash. The Company’s restricted cash is pledged as collateral for a standby letter of credit related to a property lease. The balance of restricted cash was $1.8 million as of December 31, 2023 and 2022, and is included in other long-term assets.

Accrued and other current liabilities consist of the following (in thousands):


	December 31,
	2023		2022
Accrued compensation	$	12,816	$	9,008
Operating lease liabilities		7,761		5,391
Loans—current portion (Note 6)		1,646		2,218
Accrued liabilities		858		1,700
Employee ESPP contributions		311		543
Customer deposits		512		30
Accrued taxes		37		123
Total accrued and other current liabilities	$	23,941	$	19,013