Stock-based Compensation (Assumptions Used in the Black-Scholes Model) (Details) - Common Stock Options [Member]	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020
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	0.0073	0.0013
Minimum [Member] | Measurement Input, Price Volatility [Member]
Fair value input, equity securities	84.07	0.9043
Minimum [Member] | Measurement Input, Expected Term [Member]
Fair value input, equity securities		0.0550
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Fair value input, equity securities	0.0129	0.0148
Maximum [Member] | Measurement Input, Price Volatility [Member]
Fair value input, equity securities	0.9337	0.940
Maximum [Member] | Measurement Input, Expected Term [Member]
Fair value input, equity securities		0.0700