Quarterly report pursuant to Section 13 or 15(d)

Cash Equivalents and Equity Securities - Components of Cash Equivalents (Details)

v3.20.2
Cash Equivalents and Equity Securities - Components of Cash Equivalents (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Cash Equivalents and Marketable Securities [Line Items]      
Cash and cash equivalents $ 71,516 $ 90,498 $ 92,143
Money Market Funds [Member]      
Cash Equivalents and Marketable Securities [Line Items]      
Cash and cash equivalents 51,488 71,248  
Cash and cash equivalents, fair value $ 51,488 $ 71,248