XML 20 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document And Entity Information - USD ($)
 12 Months Ended
Apr. 30, 2018
Jun. 06, 2018
Oct. 31, 2017
Document Information [Line Items]      
Entity Registrant Name AMERICAS CARMART INC    
Entity Central Index Key 0000799850    
Trading Symbol crmt    
Current Fiscal Year End Date --04-30    
Entity Filer Category Large Accelerated Filer    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding (in shares)   6,957,518  
Entity Public Float     $ 307,543,577
Document Type 10-K    
Document Period End Date Apr. 30, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false