LIXTE Biotechnology Holdings, Inc. Quarterly report pursuant to Section 13 or 15(d)

Summary of Related Party Costs (Details) - USD ($)	3 Months Ended		9 Months Ended
Summary of Related Party Costs (Details) - USD ($)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Related Party Transaction [Line Items]
Total	$ 540,972	$ 464,483	$ 2,390,308	$ 518,483
Cash Based [Member]
Related Party Transaction [Line Items]
Total	193,750	70,452	536,250	124,452
Stock Based [Member]
Related Party Transaction [Line Items]
Total	$ 347,222	$ 394,031	$ 1,854,058	$ 394,031