XML 12 R1.htm IDEA: XBRL DOCUMENT v3.23.2
Cover - shares
6 Months Ended
Jun. 30, 2023
Aug. 08, 2023
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2023  
Document Transition Report false  
Entity File Number 001-33987  
Entity Registrant Name HERITAGE-CRYSTAL CLEAN, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 26-0351454  
Entity Address, Address Line One 2000 Center Drive  
Entity Address, Address Line Two Suite East C300  
Entity Address, City or Town Hoffman Estates  
Entity Address, State or Province IL  
Entity Address, Postal Zip Code 60192  
City Area Code 847  
Local Phone Number 836-5670  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol HCCI  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   24,370,405
Entity Central Index Key 0001403431  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q2  
Amendment Flag false