Equity Incentive Plans (Assumptions Used in the Black-Scholes Model) (Details) - Common Stock Options [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2023 Y	Sep. 30, 2022 Y	Sep. 30, 2023 Y	Sep. 30, 2022 Y
Measurement Input, Expected Dividend Rate [Member]
Fair value input, equity securities	0	0	0	0
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Fair value input, equity securities	5.49	3.3	3.54	2.65
Minimum [Member] | Measurement Input, Price Volatility [Member]
Fair value input, equity securities	75.4	81.81	75.40	81.81
Minimum [Member] | Measurement Input, Expected Term [Member]
Fair value input, equity securities	0.12	5.5	0.12	5.50
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Fair value input, equity securities	5.54	3.4	5.54	3.52
Maximum [Member] | Measurement Input, Price Volatility [Member]
Fair value input, equity securities	116.96	85.0	116.96	85.67
Maximum [Member] | Measurement Input, Expected Term [Member]
Fair value input, equity securities	0.6	6.3	7.00	7.00