Description of Business, Summary of Significant Accounting Policies, and Going Concern - Narrative (Details)			3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 23, 2023	Apr. 25, 2019 shares	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) shares	Feb. 15, 2023 shares	Dec. 31, 2022 USD ($)
Disaggregation of Revenue
Stock split	0.2
Common stock, shares authorized (in shares) | shares			50,000,000		50,000,000		50,000,000
Net income (loss) attributable to T Stamp Inc.			$ 683,524	$ (35,162)	$ (4,593,406)	$ (4,752,980)
Operating cash outflows					6,183,158	5,884,123
Working capital			(1,450,000)		(1,450,000)
Accumulated deficit			$ 55,446,691		$ 55,446,691		$ 50,853,285
Treasury stock, at cost, shares held (in shares) | shares			0		0		54,734
Common stock, shares issued (in shares) | shares			18,819,750		18,819,750		9,198,089
Cash and cash equivalents			$ 598,031	$ 3,182,503	$ 598,031	$ 3,182,503	$ 3,140,747		$ 1,254,494
Impairment on finite-lived assets					$ 24,000		12,000
Impairment, intangible asset, finite-lived, statement of income or comprehensive income					Research and development
Impaired capitalized internal-use software							$ 19,000
Customer One | Accounts receivable | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)					65.12%		53.55%
Customer Two | Accounts receivable | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)					17.12%		30.43%
Customer Three | Accounts receivable | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)					4.63%		7.13%
Top Three Customers | Accounts receivable | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)					86.87%		91.11%
Top Three Customers | Sales revenue net | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)			93.24%	95.85%	94.68%	90.53%
S And P 500 Bank | Sales revenue net | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)			66.34%	6.07%	63.66%	14.95%
Mastercard | Sales revenue net | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)			17.60%	7.91%	21.07%	12.60%
Triton | Sales revenue net | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)			9.30%		9.95%
IGS | Sales revenue net | Customer Concentration Risk
Disaggregation of Revenue
Concentration risk (as a percent)				81.87%		62.98%
Bank Time Deposits
Disaggregation of Revenue
Cash and cash equivalents			$ 30,342		$ 30,342		$ 2,620,765
Common Class A
Disaggregation of Revenue
Treasury stock, at cost, shares held (in shares) | shares		320,513
Common stock, shares issued (in shares) | shares								206,033
Common stock, shares held (in shares) | shares			0		0
Common Class A | Various employees
Disaggregation of Revenue
Number of shares transferred (in shares) | shares		264,000