v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
May 08, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-37949  
Entity Registrant Name Innovative Industrial Properties, Inc.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 81-2963381  
Entity Address, Address Line One 1389 Center Drive, Suite 200  
Entity Address, City or Town Park City  
Entity Address, State or Province UT  
Entity Address, Postal Zip Code 84098  
City Area Code 858  
Local Phone Number 997-3332  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   28,011,229
Entity Central Index Key 0001677576  
Amendment Flag false  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol IIPR  
Security Exchange Name NYSE  
Series A Preferred Stock    
Document Information [Line Items]    
Title of 12(b) Security Series A Preferred Stock, par value $0.001 per share  
Trading Symbol IIPR-PA  
Security Exchange Name NYSE