Fair Value Measurement (Narrative) (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
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 March 31, 2025 and December 31, 2024.
Probability of default [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, measurement input	75.00%	75.00%
Expected volatility [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, measurement input	243.20%	220.40%
Expected volatility [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, measurement input	289.30%	247.80%
Credit spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Premium percentage added to credit spread	10.00%	10.00%
Convertible promissory notes, measurement input	22.28%	23.07%