Equity Incentive Plans (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2024	Dec. 31, 2023
Equity Incentive Plans
Shares, Balance Beginning	3,165,216
Shares, Granted	1,784,054
Shares, Exercised	(37,282)
Shares, Forfeited/Cancelled/Expired	(977,257)
Shares, Balance Ending	3,934,731	3,165,216
Vested and expected to vest at September 30, 2024	3,934,731
Exercisable at June 30, 2024	2,094,287
Weighted Average Exercise Price, Outstanding Beginning	$ 5.04
Weighted Average Exercise Price, Granted	3.38
Weighted Average Exercise Price, Exercised	3.38
Weighted Average Exercise Price, Forfeited/Cancelled/Expired	7.10
Weighted Average Exercise Price, Outstanding Ending	3.79	$ 5.04
Weighted Average Exercise Price, Vested and expected to vest at September 30, 2024	3.79
Weighted Average Exercise Price, Exercisable at September 30, 2024	$ 4.07
Weighted Average Remaining Contractual Term (Years), Outstanding	7 years 9 months 18 days	5 years 10 months 24 days
Weighted Average Remaining Contractual Term (Years), Vested and expected to vest at September 30, 2024	7 years 9 months 18 days
Weighted Average Remaining Contractual Term (Years), Exercisable at September 30, 2024	6 years 7 months 6 days
Aggregate Intrinsic Value, Outstanding Beginning	$ 429
Aggregate Intrinsic Value, Exercised	24
Aggregate Intrinsic Value, Outstanding Ending	15	$ 429
Aggregate Intrinsic Value, Vested and expected to vest at September 30, 2024	15
Aggregate Intrinsic Value, Exercisable at September 30, 2024	$ 3

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