0000872912 2021-03-31 2021-03-31 NASDAQ NY false 0000872912 8-K 2021-03-31 DELCATH SYSTEMS, INC. DE 001-16133 06-1245881 1633 Broadway Suite 22C New York 10019 (212) 489-2100 false false false false Common Stock, $.01 par value DCTH false