Property, Plant, and Equipment

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	Estimated Useful Lives (Years)	March 31, 2021		December 31, 2020
Land	N/A	$	1,340	$	1,340
Buildings and land improvements	15-39	2,487		2,486
Manufacturing equipment	7	13,269		13,261
Furniture, fixtures and equipment	5-7	477		443
Vehicles	5	140		140
Hardware and software	3-5	1,333		887
Machinery in progress		82		—
Total		19,128		18,557
Less: accumulated depreciation		(9,388)		(8,783)
Property, plant and equipment, net		$	9,740	$	9,774

Depreciation expense was $0.6 million and $0.5 million for the three months ended March 31, 2021 and 2020, respectively, of which $0.5 million and $0.4 million, respectively, has been allocated to cost of revenue and $0.1 million and $0.1 million, respectively, is included in depreciation and amortization in the accompanying condensed consolidated statements of operations for the three months ended March 31, 2021 and 2020.