Quarterly report pursuant to Section 13 or 15(d)

Cash Equivalents and Equity Securities - Textual (Details)

v3.20.2
Cash Equivalents and Equity Securities - Textual (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents $ 71,516 $ 90,498 $ 92,143
Investment at cost basis $ 1,000 0  
Molecular Assemblies, Inc. [Member]      
Cash and Cash Equivalents [Line Items]      
Ownership percentage 4.00%    
Money Market Funds [Member]      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents $ 51,488 71,248  
Cash [Member]      
Cash and Cash Equivalents [Line Items]      
Cash and cash equivalents $ 20,000 $ 19,300