Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Total Assets	$ 2,118	$ 12,044
Total Liabilities	34,800	37,119
Warrant liability
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Total Liabilities		2,819
Series X preferred stock liability
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Total Liabilities	34,800	34,300
Cash
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Cash equivalents - money market funds	500	3,342
Money market funds
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Cash equivalents - money market funds	1,618	8,702
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Total Assets	2,118	12,044
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Cash
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Cash equivalents - money market funds	500	3,342
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Money market funds
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Cash equivalents - money market funds	1,618	8,702
Level 3 fair value measurement
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Total Liabilities	34,800	37,119
Level 3 fair value measurement | Warrant liability
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Total Liabilities		2,819
Level 3 fair value measurement | Series X preferred stock liability
Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Total Liabilities	$ 34,800	$ 34,300