Investments (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Marketable Securities [Line Items]
Amortized Cost	$ 65,562,000		$ 65,562,000		$ 89,411,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(461,000)		(461,000)		(978,000)
Credit Losses	0		0		0
Estimated Fair Value	65,101,000		$ 65,101,000		$ 88,433,000
Remaining contractual maturity period			3 years		3 years
Impairments of assets	0	$ 0	$ 0	$ 0
Short-term investments
Marketable Securities [Line Items]
Estimated Fair Value	44,870,000		44,870,000		$ 68,471,000
Long-term investments
Marketable Securities [Line Items]
Estimated Fair Value	20,231,000		20,231,000		19,962,000
Commercial paper
Marketable Securities [Line Items]
Amortized Cost	8,612,000		8,612,000		15,707,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(4,000)		(4,000)		(101,000)
Credit Losses	0		0		0
Estimated Fair Value	8,608,000		8,608,000		15,606,000
Corporate notes
Marketable Securities [Line Items]
Amortized Cost	38,036,000		38,036,000		52,159,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(367,000)		(367,000)		(831,000)
Credit Losses	0		0		0
Estimated Fair Value	37,669,000		37,669,000		51,328,000
U.S. government agency bonds
Marketable Securities [Line Items]
Amortized Cost	18,914,000		18,914,000		21,545,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	(90,000)		(90,000)		(46,000)
Credit Losses	0		0		0
Estimated Fair Value	$ 18,824,000		$ 18,824,000		$ 21,499,000