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Cover - shares
9 Months Ended
Sep. 30, 2024
Nov. 07, 2024
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2024  
Document Transition Report false  
Entity File Number 001-39835  
Entity Registrant Name Benson Hill, Inc.  
Entity Incorporation, State Code DE  
Entity Tax Identification Number 85-3374823  
Entity Address, Address Line One 1001 North Warson Rd, Ste 300  
Entity Address, City or Town St. Louis,  
Entity Address, State or Province MO  
Entity Address, Postal Zip Code 63132  
City Area Code (314)  
Local Phone Number 222-8218  
Title of 12(b) Security Common Stock, $0.0001 par value  
Trading Symbol BHIL  
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 true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   6,114,020
Entity Central Index Key 0001830210  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q3  
Amendment Flag false