Property and Equipment

3 Months Ended

Mar. 31, 2022

Property, Plant and Equipment [Abstract]

Property and Equipment

4. Property and Equipment

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

	March 31, 2022			December 31, 2021
Equipment	$	5,345		$	5,351
Furniture and fixtures		22			22
Leasehold improvements		1,586			1,531
Software		365			365
Total property and equipment–at cost		7,318			7,269
Less: Accumulated depreciation		(5,176	)		(5,026	)
Property and equipment, net	$	2,142		$	2,243

Depreciation expense for each of three months ended March 31, 2022 and 2021 was $0.2 million.