Equity Incentive Plans (Summary of Stock Option Activity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Equity Incentive Plans
Shares, Balance Beginning	3,352,803
Shares, Granted	330,266
Shares, Exercised	(1,500)
Shares, Forfeited/Cancelled	(516,353)
Shares, Balance Ending	3,165,216	3,352,803
Vested and expected to vest at September 30, 2023	3,165,216
Exercisable at September 30, 2023	2,176,275
Weighted Average Exercise Price, Outstanding Beginning	$ 5.32
Weighted Average Exercise Price, Granted	2.39
Weighted Average Exercise Price, Exercised	3.15
Weighted Average Exercise Price, Forfeited/Cancelled	4.94
Weighted Average Exercise Price, Outstanding Ending	5.04	$ 5.32
Weighted Average Exercise Price, Vested and expected to vest at September 30, 2023	5.04
Weighted Average Exercise Price, Exercisable at September 30, 2023	$ 4.01
Weighted Average Remaining Contractual Term (Years), Outstanding	5 years 10 months 24 days	7 years 9 months 18 days
Weighted Average Remaining Contractual Term (Years), Vested and expected to vest at September 30, 2023	5 years 10 months 24 days
Weighted Average Remaining Contractual Term (Years), Exercisable at September 30, 2023	4 years
Aggregate Intrinsic Value, Exercised	$ 1
Aggregate Intrinsic Value, Forfeited/Cancelled	1,000
Aggregate Intrinsic Value, Outstanding Ending	429
Aggregate Intrinsic Value, Vested and expected to vest at September 30, 2023	429
Aggregate Intrinsic Value, Exercisable at September 30, 2023	$ 115,000