Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 12, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	DELCATH SYSTEMS, INC.
Entity Central Index Key	0000872912
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		1,521,933
Document Fiscal Year Focus	2016
Trading Symbol	DCTH
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016