Property and Equipment

12 Months Ended

Dec. 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 December 31:

	2021		2020
Machinery & equipment	$	4,848	$	4,683
Right of use, building and lease	520		471
Computer equipment & software	640		272
Office furniture & equipment	174		174
Leasehold improvements	43		43
Idle equipment	679		679
Construction in progress	—		119
Total	6,904		6,441
Less accumulated depreciation	(5,163)		(5,023)
Total property, plant & equipment, net	$	1,741	$	1,418

Depreciation expense for years ended December 31, 2021, 2020 and 2019 was approximately $0.1 million, $0.5 million and $1.8 million, respectively. The Company evaluated and adjusted the estimated useful life of certain equipment related to the production of BUNAVAIL that resulted in the additional depreciation expense. As such, the 2020 and 2019 depreciation expense includes an additional $0.3 million and $1.5 million, respectively, associated with accelerated depreciation for BUNAVAIL specific equipment.