Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents and Short-Term Investments - Unrealized Loss Position (Details)

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Cash, Cash Equivalents and Short-Term Investments - Unrealized Loss Position (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
position
Dec. 31, 2020
Fair value and gross unrealized losses of investments in individual securities in unrealized loss position    
Weighted-average time to maturity of cash equivalents and available-for-sale securities 39 days 78 days
Number of investments in continuous unrealized loss position for more than 12 months | position 0  
Number of individual securities in unrealized loss position for 12 months or less | position 18  
Other-than-temporary impairments of securities $ 0  
Corporate bonds and commercial paper    
Fair value and gross unrealized losses of investments in individual securities in unrealized loss position    
Fair Value 19,147  
Unrealized Losses $ 1