Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Oct. 15, 2017	Jun. 30, 2016
Document Information [Line Items]
Document Type	10-K
Amendment Flag	true
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Entity Registrant Name	Capstone Therapeutics Corp.
Entity Central Index Key	0000887151
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 1,450,000
Trading Symbol	CAPS
Entity Common Stock, Shares Outstanding		54,385,411
Amendment Description	On March 15, 2017, Capstone Therapeutics Corp. (the “Company”) filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2016 (the “Original Form 10-K”). This Amendment No. 1 (the “Amendment”) amends the Original 10-K to reflect the sale of the Company’s Common Stock, issuance of debt, and appointment of two new directors, on July 14, 2017 by amending Part II, Items 5 and 7, Part III Items 10, 11, and 13, and Part IV. Item 15 of the Original Form 10-Kwas amended to include a report of our independent registered public accountant, previously omitted from the Original Form 10-K, and the Financial Statements have been updated through the date of the report of our independent registered public accountant, October 30, 2017. In addition, as required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended, new certifications by our principal executive officers and principal financial officer are filed as exhibits to this Amendment under Item 15 of Part IV hereof. Except as stated herein, this Amendment does not reflect events occurring after the filing of the Original Form 10-K with the Securities and Exchange Commission on March 15, 2017 and no attempt has been made in this Amendment to modify or update other disclosures as presented in the Original Form 10-K.