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Property and Equipment
12 Months Ended
Dec. 31, 2019
Property and Equipment [Abstract]  
Property and Equipment Property and Equipment
 
Property and equipment at December 31, 2019 and 2018 are as follows:
 Estimated Useful LivesAs of December 31,
 In Years20192018
 (in thousands)
Computers and software3-5$4,587  $4,557  
Furniture and fixtures5-75,629  5,644  
Laboratory equipment3-73,279  3,378  
Leasehold improvements3-7417  416  
Buildings15-4059,212  59,212  
Land—  2,664  2,664  
Total property and equipment 75,788  75,871  
Less: Accumulated depreciation and amortization (61,741) (60,006) 
Net property and equipment $14,047  $15,865