XML 12 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2019
Aug. 07, 2019
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 Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity File Number 001-16133  
Entity Tax Identification Number 061245881  
Entity Address, Address Line One 1633 Broadway  
Entity Address, Address Line Two Suite 22C  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10019  
City Area Code 212  
Local Phone Number 489-2100  
Entity Shell Company false  
Entity Current Reporting Status Yes  
Entity Common Stock, Shares Outstanding   18,277,807
Document Fiscal Year Focus 2019  
Trading Symbol DCTH  
Document Fiscal Period Focus Q2  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019