v3.25.3

Common Stock Incentive Plan - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended				9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restricted Stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation cost			$ 5.7				$ 5.7
Amortization period							1 year 9 months 18 days
Fair value of restricted stock							$ 2.4
Granted (in shares)			276	6,291	62,817
Restricted Stock Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation cost			$ 7.0				$ 7.0
Amortization period							1 year 9 months 18 days
Granted (in shares)				2,796	73,179
PSUs
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Granted (in shares)	102,641	70,795
Stock-based compensation expense						$ 1.7		$ 5.0
2016 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares authorized			1,000,000				1,000,000
Expiration term							10 years

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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INNOVATIVE INDUSTRIAL PROPERTIES INC 10-Q