Property, Plant and Equipment

3 Months Ended

Mar. 30, 2019

Property, Plant and Equipment [Abstract]

Property, plant, and equipment are stated at cost and capital lease assets are included. A summary of property, plant, and equipment as of March 30, 2019 and December 31, 2018, is as follows:



(in thousands)	March 30, 2019		December 31, 2018
Manufacturing equipment	$	28,866	$	25,314
Research and development equipment	7,111		6,088
Leasehold improvements	7,166		7,080
Capital leases	883		882
Software	125		60
Furniture and fixtures	203		195
Vehicles	210		210
Assets not yet placed in service	1,877		3,374
Total property, plant and equipment	$	46,441	$	43,203
Less: accumulated depreciation and amortization	14,580		12,676
Property, plant and equipment, net	$	31,861	$	30,527

Depreciation and amortization expense for the three months ended March 30, 2019 and March 31, 2018, was $1.9 million and $0.7 million, respectively. Of the total depreciation and amortization expense in the three months ended March 30, 2019 and March 31, 2018, $1.4 million and $0.6 million, respectively, were recorded in cost of goods sold and $0.5 million and $0.1 million, respectively, were recorded in research and development expenses in the Company’s condensed statements of operations.

The Company has $1.9 million and $1.0 million in property, plant and equipment concluded to meet the criteria for assets held for sale and are included in prepaid expenses and other current assets on the condensed balance sheets as of March 30, 2019 and December 31, 2018, respectively. The Company expects to sell such assets in 2019 for amounts that approximate book value.