Investments (Tables)

3 Months Ended

Mar. 31, 2021

Investments in privately-held companies [Abstract]

Equity Securities without Readily Determinable Fair Value

The following table summarizes the activity related to our investments in privately-held companies as of March 31, 2021 and December 31, 2020 (in thousands):

	March 31, 2021		December 31, 2020
Cost of investments	$	5,000	$	3,000
Cumulative impairment	—		—
Cumulative upward adjustment	5,314		5,314
Carrying amount of investments	$	10,314	$	8,314