Investments (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Marketable Securities [Line Items]
Amortized Cost	$ 77,385,000		$ 65,852,000
Gross Unrealized Gains	0		1,000
Gross Unrealized Losses	(242,000)		(101,000)
Credit Losses	0		0
Estimated Fair Value	$ 77,143,000		$ 65,752,000
Remaining contractual maturity period	3 years		3 years
Impairments of assets	$ 0	$ 0
Short-term investments
Marketable Securities [Line Items]
Estimated Fair Value	47,710,000		$ 40,469,000
Long-term investments
Marketable Securities [Line Items]
Estimated Fair Value	29,433,000		25,283,000
Commercial paper
Marketable Securities [Line Items]
Amortized Cost	7,396,000		3,638,000
Gross Unrealized Gains	0		1,000
Gross Unrealized Losses	(13,000)		0
Credit Losses	0		0
Estimated Fair Value	7,383,000		3,639,000
Corporate notes
Marketable Securities [Line Items]
Amortized Cost	56,803,000		47,228,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(199,000)		(69,000)
Credit Losses	0		0
Estimated Fair Value	56,604,000		47,159,000
U.S. government securities
Marketable Securities [Line Items]
Amortized Cost	2,473,000		983,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(1,000)		0
Credit Losses	0		0
Estimated Fair Value	2,472,000		983,000
U.S. government agency bonds
Marketable Securities [Line Items]
Amortized Cost	10,713,000		14,003,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(29,000)		(32,000)
Credit Losses	0		0
Estimated Fair Value	$ 10,684,000		$ 13,971,000