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Property, Plant and Equipment, Net
 9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Property, plant and equipment consist of the following:
September 30,
2021		December 31,
2020
Land and land improvements$9,844 $9,844 
Buildings and building improvements12,088 12,088 
Furniture and fixtures1,236 1,228 
Equipment32,634 31,150 
Leasehold improvements6,452 6,260 
Breeding stock968 868 
Computer hardware and software5,425 5,684 
Construction and other assets in progress2,729 2,754 
71,376 69,876 
Less: Accumulated depreciation and amortization(38,619)(34,952)
Property, plant and equipment, net$32,757 $34,924 
Depreciation expense was $1,525 and $1,873 for the three months ended September 30, 2021 and 2020, respectively, and $4,711 and $5,689 for the nine months ended September 30, 2021 and 2020, respectively.