Equipment and Leasehold Improvements

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Equipment and Leasehold Improvements

(5) Equipment and Leasehold Improvements

Equipment and leasehold improvements consist of the following: 

	As of December 31,
	2021			2020
Machinery and equipment	$	18,289		$	16,758
Office equipment		961			870
Office furniture		110			110
Leasehold improvements		4,900			4,850
Construction in progress		1,062			445
		25,322			23,033
Less: Accumulated depreciation and amortization		(20,610	)		(20,165	)
	$	4,712		$	2,868

Depreciation expense was $444 and $348, for the years ended December 31, 2021 and 2020, respectively.