Property and Equipment

3 Months Ended

Mar. 31, 2022

Property Plant And Equipment [Abstract]

Property and Equipment

3. Property and Equipment

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

	March 31,			December 31,
	2022			2021
Machinery and equipment	$	1,603		$	1,610
Computer equipment and software		243			243
Office equipment		104			104
Leasehold improvements		558			549
Construction in progress		—			1
		2,508			2,507
Less: accumulated depreciation and amortization		(2,160	)		(2,123	)
Property and equipment, net	$	348		$	384

Depreciation and amortization expense for the three months ended March 31, 2022 and 2021 was $37 thousand and $42 thousand, respectively.