v3.19.2
Document And Entity Information - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Jun. 14, 2019
Sep. 23, 2018
Document Information [Line Items]      
Entity Registrant Name NATHANS FAMOUS INC    
Entity Central Index Key 0000069733    
Trading Symbol nath    
Current Fiscal Year End Date --03-31    
Entity Filer Category Accelerated Filer    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Emerging Growth Company false    
Entity Small Business true    
Entity Common Stock, Shares Outstanding (in shares)   4,210,692  
Entity Public Float     $ 249,335
Entity Shell Company false    
Document Type 10-K    
Document Period End Date Mar. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false