Stockholders' Equity and Stock-based Compensation Expense - Activity Of Options Outstanding Under the 2019 Plans (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Shares Available for Grant
Beginning balance (in shares)	3,554,537
Stock awards canceled / forfeited / expired (in shares)	142,537
Options canceled / forfeited / expired (in shares)	135,107
Ending balance (in shares)	2,527,803	3,554,537
Number of Stock Options Outstanding
Beginning balance (in shares)	1,282,240
Options granted in period (in shares)	1,154,500
Options exercised (in shares)	0
Options canceled / forfeited / expired (in shares)	(135,107)
Ending balance (in shares)	2,301,633	1,282,240
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 17.97
Granted (in dollars per share)	2.18
Options exercised (in dollars per share)	0
Options canceled / forfeited / expired (in dollars per share)	18.86
Ending balance (in dollars per share)	$ 10.00	$ 17.97
Weighted Average Remaining Term (in Years)
Weighted average remaining term (in years)	7 years 5 months 15 days	8 years 2 months 15 days
RSUs
Shares Available for Grant
Options and stock awards granted (in shares)	(1,304,378)