Cash, cash equivalents and short-term investments (Tables)

12 Months Ended

Dec. 31, 2021

Cash And Cash Equivalents [Abstract]

Cash, cash equivalents and short-term investments

Cash, cash equivalents and short-term investments consisted of the following as of December 31, 2021:

							Estimated
(In thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Classified as current assets:
Cash	$	196,106	$	—	$	—	$	196,106
Cash equivalents:
Money market securities		101,581		—		—		101,581
Total cash equivalents		101,581		—		—		101,581
Total cash and cash equivalents		297,687		—		—		297,687
Short-term investments:
U.S. Treasury securities		—		—		—		—
Total short-term investments		—		—		—		—
Total cash, cash equivalents and short-term investments	$	297,687	$	—	$	—	$	297,687

Cash, cash equivalents and short-term investments consisted of the following as of January 1, 2021:

							Estimated
(In thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Classified as current assets:
Cash	$	146,083	$	—	$	—	$	146,083
Cash equivalents:
Money market securities		51,442		—		—		51,442
Total cash equivalents		51,442		—		—		51,442
Total cash and cash equivalents		197,525		—		—		197,525
Short-term investments:
U.S. Treasury securities		44,993		8		—		45,001
Total short-term investments		44,993		8		—		45,001
Total cash, cash equivalents and short-term investments	$	242,518	$	8	$	—	$	242,526