Annual report pursuant to Section 13 and 15(d)

Cash Equivalents - Summary of Cash Equivalents (Details)

v3.20.4
Cash Equivalents - Summary of Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Cash And Cash Equivalents [Line Items]    
Amortized Cost $ 28,710 $ 16,514
Estimated Fair Value 28,710 16,514
Money Market Mutual Funds    
Cash And Cash Equivalents [Line Items]    
Amortized Cost 24,210 16,514
Estimated Fair Value 24,210 $ 16,514
Commercial Paper    
Cash And Cash Equivalents [Line Items]    
Amortized Cost 4,500  
Estimated Fair Value $ 4,500