Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Initial Public Offering	Private Placement	Redeemable Convertible Preferred Stock	Redeemable Convertible Preferred Stock Initial Public Offering	Series D-1 Convertible Preferred Shares	Series E Convertible Preferred Stock	Series E Redeemable Convertible Preferred Stock	Series E2 Redeemable Convertible Preferred Stock	Total Tusimple Holdings, Inc. Stockholders' Equity (Deficit)	Total Tusimple Holdings, Inc. Stockholders' Equity (Deficit) Initial Public Offering	Total Tusimple Holdings, Inc. Stockholders' Equity (Deficit) Private Placement	Total Tusimple Holdings, Inc. Stockholders' Equity (Deficit) Redeemable Convertible Preferred Stock Initial Public Offering	Total Tusimple Holdings, Inc. Stockholders' Equity (Deficit) Series D-1 Convertible Preferred Shares	Common Stock	Common Stock Initial Public Offering	Common Stock Private Placement	Common Stock Redeemable Convertible Preferred Stock Initial Public Offering	Additional Paid-in Capital	Additional Paid-in Capital Initial Public Offering	Additional Paid-in Capital Private Placement	Additional Paid-in Capital Redeemable Convertible Preferred Stock Initial Public Offering	Additional Paid-in Capital Series D-1 Convertible Preferred Shares	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Noncontrolling Interests
Beginning Balance (in shares) at Dec. 31, 2018				60,249,352
Beginning Balance at Dec. 31, 2018				$ 181,236
Increase (Decrease) in Temporary Equity [Roll Forward]
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares (in shares)	8,218,203
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares	$ 60,000
Issuance of redeemable convertible preferred stock, net of issuance costs (in shares)						6,471,833
Issuance of redeemable convertible preferred shares, net of issuance costs						$ 52,299
Conversion of related party convertible loan to Series E-1 redeemable convertible preferred shares	0
Accretion of redeemable convertible preferred shares to redemption value						$ 201
Ending Balance (in shares) at Dec. 31, 2019				74,939,388
Ending Balance at Dec. 31, 2019				$ 293,736
Beginning Balance (in shares) at Dec. 31, 2018															64,734,628
Beginning Balance at Dec. 31, 2018	(74,122)									$ (74,111)					$ 6				$ 0					$ (440)	$ (73,677)	$ (11)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares (in shares)															(8,218,203)
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares	(60,000)									(60,000)															(60,000)
Accretion of redeemable convertible preferred shares to redemption value	(201)									(201)															(201)
Reclassification of Series D-1 redeemable convertible preferred share warrants from equity to liabilities	0
Foreign currency translation adjustment	(208)									(218)														(218)		10
Net loss	(84,883)									(84,840)															(84,840)	(43)
Ending Balance (in shares) at Dec. 31, 2019															56,516,425
Ending Balance at Dec. 31, 2019	(219,414)									(219,370)					$ 6				0					(658)	(218,718)	(44)
Increase (Decrease) in Temporary Equity [Roll Forward]
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares	0
Issuance of Series D-1 redeemable convertible preferred shares from the exercise of warrants (in shares)						308,182
Issuance of Series D-1 redeemable convertible preferred shares from the exercise of warrants						$ 2,894
Issuance of redeemable convertible preferred stock, net of issuance costs (in shares)						1,854,177	21,044,019
Issuance of redeemable convertible preferred shares, net of issuance costs						$ 3,098	$ 288,548
Conversion of related party convertible loan to Series E-1 redeemable convertible preferred shares (in shares)							3,928,937
Conversion of related party convertible loan to Series E-1 redeemable convertible preferred shares	55,556						$ 55,556
Accretion of redeemable convertible preferred shares to redemption value	$ 20,959
Ending Balance (in shares) at Dec. 31, 2020	102,074,703			102,074,703
Ending Balance at Dec. 31, 2020	$ 664,791			$ 664,791
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable convertible preferred shares to redemption value	(20,959)									(20,959)									(12,369)						(8,590)
Reclassification of Series D-1 redeemable convertible preferred share warrants from equity to liabilities	(394)					$ (394)								$ (394)									$ (394)
Issuance of restricted ordinary shares (in shares)															1,899,680
Acquisition of noncontrolling interest in subsidiary										(44)														(44)		44
Issuance of ordinary shares from exercise of options (in shares)															2,127,232
Stock-based compensation	12,763									12,763									12,763
Foreign currency translation adjustment	401									401														401
Net loss	(177,870)									(177,870)															(177,870)
Ending Balance (in shares) at Dec. 31, 2020															60,543,337
Ending Balance at Dec. 31, 2020	(405,473)									(405,473)					$ 6				0					(301)	(405,178)	0
Increase (Decrease) in Temporary Equity [Roll Forward]
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares	0
Issuance of redeemable convertible preferred stock, net of issuance costs (in shares)								4,650,999
Issuance of redeemable convertible preferred shares, net of issuance costs								$ 61,631
Issuance of redeemable convertible preferred stock from exercise of warrants (in shares)								9,477,073	4,331,644
Issuance of redeemable convertible preferred stock from exercise of warrants								$ 379,084	$ 173,275
Conversion of related party convertible loan to Series E-1 redeemable convertible preferred shares	0
Accretion of redeemable convertible preferred shares to redemption value	$ 4,135
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering (in shares)					(120,534,419)
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering					$ (1,282,916)
Ending Balance (in shares) at Dec. 31, 2021	0			0
Ending Balance at Dec. 31, 2021	$ 0			$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares (in shares)																		120,534,419
Exchange of Series A-2 redeemable convertible preferred shares for ordinary shares					$ 1,282,916								$ 1,282,916					$ 12				$ 1,282,904
Accretion of redeemable convertible preferred shares to redemption value	4,135									4,135									4,135
Reclassification of Series D-1 redeemable convertible preferred share warrants from equity to liabilities	0
Issuance of common stock (in shares)																27,027,027	874,999
Issuance of common stock		$ 1,027,374	$ 35,000								$ 1,027,374	$ 35,000				$ 3				$ 1,027,371	$ 35,000
Issuance of ordinary shares from exercise of options (in shares)															8,580,984
Issuance of common stock from exercise of options	911									911					$ 1				910
Issuance of common stock related to release of RSUs and SVAs (in shares)															4,272,429
Vesting of early exercised stock options	84									84									84
Stock-based compensation	122,596									122,596									122,596
Foreign currency translation adjustment	378									378														378
Net loss	(732,673)									(732,673)															(732,673)
Ending Balance (in shares) at Dec. 31, 2021															221,833,195
Ending Balance at Dec. 31, 2021	$ 1,326,978									$ 1,326,978					$ 22				$ 2,464,730					$ 77	$ (1,137,851)	$ 0