Property, Plant and Equipment (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2020

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Summary of property, plant and equipment

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

	Estimated Useful Lives (Years)		December 31, 2019			September 30, 2020 (unaudited)
Land		N/A	$	1,340		$	1,340
Buildings and land improvements		15-39		2,464			2,487
Manufacturing equipment		7		12,631			13,002
Furniture, fixtures and equipment		5-7		277			287
Vehicles		5		140			140
Hardware and software		3-5		398			589
				17,250			17,845
Less: accumulated depreciation				(6,590	)		(8,225	)
Total			$	10,660		$	9,620

Property, plant and equipment consisted of the following at December 31, (in thousands):

	Estimated Useful Lives (Years)		2018			2019
Land		N/A	$	1,340		$	1,340
Buildings and land improvements		15-39		2,448			2,464
Manufacturing equipment		7		10,954			12,631
Furniture, fixtures and equipment		5-7		332			277
Vehicles		5		123			140
Hardware and software		3-5		358			398
				15,555			17,250
Less: accumulated depreciation				(4,526	)		(6,590	)
Total			$	11,029		$	10,660