XML 12 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information - USD ($)
 9 Months Ended
Sep. 30, 2017
Nov. 01, 2017
Jun. 30, 2016
Entity Information [Line Items]      
Entity Registrant Name Artesian Resources Corporation    
Entity Central Index Key 0000863110    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus Q3    
Document Type 10-Q    
Amendment Flag false    
Document Period End Date Sep. 30, 2017    
Class A Stock [Member]      
Entity Information [Line Items]      
Entity Public Float     $ 269,178,000
Entity Common Stock, Shares Outstanding   8,311,597  
Class B Stock [Member]      
Entity Information [Line Items]      
Entity Public Float     $ 8,328,000
Entity Common Stock, Shares Outstanding   881,452