Property and Equipment

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and equipment:

Property and equipment, summarized by major category, consist of the following as of:

	March 31, 2021		December 31, 2020
Machinery & equipment	$	4,848	$	4,683
Right of use, building lease	403		471
Computer equipment & software	272		272
Office furniture & equipment	174		174
Leasehold improvements	43		43
Idle equipment	679		679
Construction in progress	250		119
Total	6,669		6,441
Less accumulated depreciation and amortization	(5,043)		(5,023)
Total property and equipment, net	$	1,626	$	1,418

Depreciation expense for the each of three-month periods ended March 31, 2021 and March 31, 2020, was approximately $0.02 million, respectively