Fair Value Measurement - (Narrative) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of increased in required payout	50.00%	50.00%
Probability of default [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	50.00%
Credit spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Premium percentage added to credit spread	10.00%
Minimum [Member] | Probability of default [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	0.00%
Minimum [Member] | Expected volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	95.00%
Minimum [Member] | Credit spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	15.25%
Maximum [Member] | Probability of default [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	40.00%
Maximum [Member] | Expected volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	160.00%
Maximum [Member] | Credit spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible promissory notes, Measurement input	18.39%