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Equity Incentive Plans (Assumptions Used in the Black-Scholes Model) (Details) - Common Stock Options [Member]
6 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Measurement Input, Expected Dividend Rate [Member]    
Fair value input, equity securities 0 0
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Fair value input, equity securities 0.0424 0.0354
Minimum [Member] | Measurement Input, Price Volatility [Member]    
Fair value input, equity securities 0.894 0.9099
Minimum [Member] | Measurement Input, Expected Term [Member]    
Fair value input, equity securities 5.12 5.5
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Fair value input, equity securities 0.0425 0.042
Maximum [Member] | Measurement Input, Price Volatility [Member]    
Fair value input, equity securities 0.925 0.9158
Maximum [Member] | Measurement Input, Expected Term [Member]    
Fair value input, equity securities 7.0 7.00