Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of property, plant, and equipment

Property, plant and equipment are carried at cost less accumulated depreciation and are depreciated using the straight-line method over the following estimated useful lives:

Leasehold improvements	Shorter of lease term or estimated useful life
Furniture and fixtures	3 years
Manufacturing equipment	5 to 10 years
Research and development equipment	5 to 10 years
Software and computer equipment	3 years
Vehicles	5 years

A summary of property, plant, and equipment as of December 31, 2019 and 2018, is as follows:

	December 31,
(in thousands)	2019		2018
Manufacturing equipment	$	37,939	$	25,314
Research and development equipment	8,933		6,088
Leasehold improvements	7,620		7,080
Capital leases	1,108		882
Software	274		60
Furniture and fixtures	433		195
Vehicles	210		210
Assets not yet placed in service	11,666		3,374
Total property, plant and equipment	$	68,183	$	43,203
Less: accumulated depreciation and amortization	20,709		12,676
Property, plant and equipment, net	$	47,474	$	30,527