XML 12 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2019
Jul. 17, 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 Address, State or Province New York  
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 Q1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019