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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment Property, plant and equipment consist of the following (in thousands):
As of December 31,
 Useful life (years)20202019
Automobile3$34 $— 
Computer hardware and software
3-5
4,840 4,764 
Manufacturing and lab equipment
2-7
69,849 59,395 
Office equipment and furniture
5-7
1,605 1,462 
Leasehold and building improvements
2-12
21,934 20,759 
Buildings309,081 — 
LandN/A3,399 — 
110,742 86,380 
Accumulated depreciation (66,262)(58,633)
$44,480 $27,747