Fair Value Measurements - Warrant liabilities (Details) - Recurring basis - Level 3 - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Stock price on valuation date	$ 1.11	$ 4.78
Exercise price per share	$ 11.50	$ 11.50
Expected life	3 years 4 months 24 days	4 years 4 months 24 days
Volatility	100.00%	82.80%
Risk-free rate	4.17%	1.17%
Dividend yield	0.00%	0.00%
Fair value of warrants	$ 0.26	$ 2.14