Fair Value Measurements - Additional Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($) Rate $ / shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($) Rate $ / shares	Dec. 31, 2023 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Notes payable	$ 629		$ 629		$ 770
Expected volatility			121.80%
Risk-free interest rate			5.07%
Servicing Asset, Fair Value, Change in Fair Value, Other, Statement of Income or Comprehensive Income [Extensible Enumeration]			Nonoperating Income (Expense)	Nonoperating Income (Expense)
Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Expected volatility				110.30%
Risk-free interest rate				3.40%
Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Expected volatility				111.60%
Risk-free interest rate				3.40%
2020 Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Long-term debt, term		1 year		1 year
Convertible debt		$ 232,000		$ 232,000
Private Placement [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Minimum purchase price | $ / shares		$ 3.18		$ 3.18
Expected volatility				73.00%
Risk-free interest rate				5.11%
Funding probability				75.00%
Change in fair value of rights from Private Placement	$ 0	$ 1,200	$ 3,800	$ 1,200
Fair value measurement		$ 3,500		$ 3,500
Discount Rate | 2020 Notes | Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Long-term debt, measurement input | Rate		0.14		0.14