Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 6,261	$ 1,843	$ 710
Cost of revenue	12,369	5,293	1,595
Gross loss	(6,108)	(3,450)	(885)
Operating expenses:
Research and development	287,167	132,001	63,619
Selling, general and administrative	118,076	38,613	22,776
Total costs and expenses	405,243	170,614	86,395
Loss from operations	(411,351)	(174,064)	(87,280)
Change in fair value of related party convertible loan	0	(5,556)	0
Change in fair value of warrants liability	(326,900)	1,816	0
Gain on loan extinguishment	4,183	0	0
Other income (expense), net	1,395	(66)	2,397
Loss before provision for income taxes	(732,673)	(177,870)	(84,883)
Provision for income taxes	0	0	0
Net loss	(732,673)	(177,870)	(84,883)
Net loss attributable to noncontrolling interests	0	0	43
Net loss attributable to TuSimple	(732,673)	(177,870)	(84,840)
Accretion of redeemable convertible preferred stock	(4,135)	(20,959)	(201)
Deemed dividend on exchange of Series A-2 redeemable convertible preferred stock for common stock	0	0	(60,000)
Net loss attributable to common stockholders, basic	(736,808)	(198,829)	(145,041)
Net loss attributable to common stockholders, diluted	$ (736,808)	$ (198,829)	$ (145,041)
Net loss per share attributable to ordinary stockholders, basic (in dollars per share)	$ (4.36)	$ (3.37)	$ (2.47)
Net loss per share attributable to ordinary stockholders, diluted (in dollars per share)	$ (4.36)	$ (3.37)	$ (2.47)
Weighted-average shares used in computing net loss per share, basic (in shares)	169,080,392	58,929,271	58,700,441
Weighted-average shares used in computing net loss per share, diluted (in shares)	169,080,392	58,929,271	58,700,441