Fair Value Measurement (Narrative) (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of increased in required payout	75.00%	50.00%
Convertible promissory notes maturity terms	which were amended post maturity, which were assumed to be 100%. The probability of default was determined in reference to a 1-year PD rate for a 'CCC+' rating at issuance, and a combination of 'CC' and 'CCC-' credit ratings at December 31, 2022 and 2021
Expected volatility [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	92.00%	95.00%
Expected volatility [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	159.00%	160.00%
Credit spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	10.00%	10.00%
Credit spread [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	24.40%	15.25%
Credit spread [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	25.60%	18.39%