Nature of Business and Summary of Significant Accounting Policies - Additional Information (Details)					1 Months Ended	2 Months Ended	12 Months Ended
	Nov. 17, 2023 USD ($) shares	Apr. 27, 2023 USD ($) $ / shares shares	Aug. 03, 2022 USD ($) shares	Aug. 01, 2022 USD ($) shares	May 31, 2022 USD ($)	Feb. 28, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Aug. 12, 2021
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
State of incorporation							DE
Date of incorporation							Aug. 03, 2018
Common stock, conversion description							minority stockholder of THIO received one share of MAIA common stock for each share of THIO common stock owned prior to the merger.
Common stock, conversion ratio							1
Working capital							$ 2,626,899
Accumulated deficit							(63,980,177)	$ (44,207,272)
Cash							7,150,695	10,950,927
Current liabilities							4,937,153	3,268,906
Revenues							0
Gross proceeds from sale of common stock			$ 9,100,000		$ 99,999	$ 2,373,561		2,473,560
Derivative instruments							0	0
Current cash reserves							7,150,695	10,950,927	$ 10,574,292
Gross proceeds from initial public offering								11,500,000
Cash equivalents							0	0
Deferred offering costs							$ 0	211,203
Accounting Standards Update [Extensible Enumeration]							us-gaap:AccountingStandardsUpdate201602Member
IPO
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of common stock sold | shares		2,555,500		2,000,000
Sale of common stock, price per share | $ / shares		$ 2.25
Gross proceeds from sale of common stock		$ 4,200,000
Issuance of common shares				$ 1,099,360				$ 8,750,095
Overallotment Option
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of common stock sold | shares			300,000
Securities Purchase Agreements
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of common stock sold | shares	2,424,243
Gross proceeds from sale of common stock	$ 1,400,000
Warrant issued	$ 1,900,000
At the market
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of common stock sold | shares		758,388
Gross proceeds from sale of common stock		$ 1,200,000
MAIA Biotechnology, Inc. | THIO Therapeutics, Inc.
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Ownership percentage by parent										93.30%
Minority stockholder ownership percentage										6.70%