v3.25.2

Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Mar. 31, 2025	Aug. 04, 2025
Document Information [Line Items]
Document Type	10-Q/A
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2025
Document Transition Report	false
Entity File Number	001-35703
Entity Registrant Name	PUMA BIOTECHNOLOGY, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0683487
Entity Address, Address Line One	10880 Wilshire Boulevard, Suite 2150
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90024
City Area Code	424
Local Phone Number	248-6500
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	PBYI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		50,370,723
Amendment Description	Puma Biotechnology, Inc. (the “Company”) is filing this Amendment No. 1 on Form 10-Q/A (this “Amendment”) to its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2025, which was originally filed with the Securities and Exchange Commission on May 8, 2025 (the “Original Filing”), to revise Part II “Item 5. Other Information” of the Original Filing to add a Rule 10b5-1 trading arrangement entered into by Troy Wilson, a member of the Company’s board of directors, adopted on March 12, 2025, which was inadvertently omitted from the disclosure included in the Original Filing.
Entity Central Index Key	0001401667
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Amendment Flag	true

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PUMA BIOTECHNOLOGY, INC. 10-Q/A