Property and equipment consist of the following (in thousands):


		March 31,			December 31,
	Estimated Useful Life (in Years)	2026			2025
Computers and purchased software	3	$	536		$	536
Leasehold improvements	Shorter of useful life or lease term		1,521			1,521
Furniture and fixtures	5		113			113
Machinery and equipment	3-5		3,542			3,542
Property and equipment—at cost			5,712			5,712
Less accumulated depreciation and amortization			(4,485	)		(4,345	)
Construction in progress			—			—
Property and equipment—net		$	1,227		$	1,367

Depreciation expense was $0.2 million for each of the three months ended March 31, 2026 and 2025, recorded as follows (in thousands):


	Three Months Ended March 31,
	2026		2025
Cost of revenue	$	125	$	127
Research and development	44			55
General and administrative	2			8
Sales and marketing	0			13
Total depreciation and amortization expense	$	171	$	203