Warrants and Stockholders’ Deficit - Narrative (Details) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Sep. 20, 2023	Jan. 18, 2022 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Jun. 10, 2024 $ / shares shares	Dec. 31, 2023 USD ($) shares	Dec. 10, 2021 $ / shares shares
Class of Stock [Line Items]
Number of warrants called (in shares)							475,264
Exercise price (in dollars per share) | $ / shares							$ 0.01
Term of warrants							5 years
Change in fair value of SPAC Warrants | $			$ 64	$ (508)	$ (17)	$ (398)
Stockholders' equity note, stock split, conversion ratio	0.05
Shares authorized (in shares)		272,000,000
Preferred stock, authorized (in shares)		250,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.0001
Delayed Draw Warrants
Class of Stock [Line Items]
Number of warrants called (in shares)							475,264		123,750
Exercise price (in dollars per share) | $ / shares							$ 0.01		$ 250.00
Term of warrants							5 years
SPAC Warrants
Class of Stock [Line Items]
Exercise price (in dollars per share) | $ / shares			$ 0.01		$ 0.01
Warrant liability | $			$ 100	$ 500	$ 100	500		$ 300
Change in fair value of SPAC Warrants | $					$ 200	$ 400
Former Series C And D Preferred Stock Warrants
Class of Stock [Line Items]
Number of warrants called (in shares)			21,281		21,281			21,281
Sonder Legacy Warrants | Additional Paid-in Capital
Class of Stock [Line Items]
Issuance of common stock upon exercise of common stock warrants | $		$ 1,200
Delayed Draw Warrants
Class of Stock [Line Items]
Value of delayed draw warrants issued | $		5,600
Delayed Draw Warrants | Additional Paid-in Capital
Class of Stock [Line Items]
Value of delayed draw warrants issued | $		$ 5,600
Post-Combination Exchangeable Common Stock
Class of Stock [Line Items]
Number of shares converted (in shares)		7,761
Common stock, authorized (in shares)			2,000,000		2,000,000			2,000,000
Post-Combination Exchangeable Common Stock | Common Stock
Class of Stock [Line Items]
Issuance of common stock upon exercise of common stock warrants | $		$ 49,700
Shares issued upon conversion (in shares)		1,616,767
Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares)		20,000,000
General Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares)		22,000,000
Special Voting Stock
Class of Stock [Line Items]
Common stock, authorized (in shares)		2,000,000