v3.4.0.3

Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Mar. 31, 2016	May. 09, 2016
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Entity Registrant Name	ROCK CREEK PHARMACEUTICALS, INC.
Entity Central Index Key	0000776008
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Trading Symbol	RCPI
Entity Common Stock, Shares Outstanding		24,220,400

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ROCK CREEK PHARMACEUTICALS, INC. 10-Q