Summary of Significant Accounting Policies (Details)			3 Months Ended				6 Months Ended
	Mar. 24, 2025 USD ($)	Feb. 26, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2025 USD ($) segment	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Aug. 09, 2022 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents			$ 30,292,000		$ 36,424,000		$ 30,292,000	$ 36,424,000	$ 49,669,000	$ 33,488,000
Accumulated deficit			(247,407,000)				(247,407,000)		(210,813,000)
Net loss attributable to TOI			(17,009,000)	$ (19,585,000)	(15,479,000)	$ (19,889,000)	(36,594,000)	(35,368,000)
Net cash provided by (used in) operating							(15,190,000)	(31,543,000)
Common stock issued for options exercised							$ 2,340,000	$ 75,000
Reduction in SG&A expenses (as a percent)							3.50%
Number of operating segments | segment							3
Number of reportable segments | segment							3
Allowance for credit losses			0				$ 0		$ 0
Goodwill impairment charges			0				$ 0
Private Placement
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common stock issued for options exercised	$ 16,500,000
Facility Agreement
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash or cash equivalent		$ 40,000,000
Facility Agreement | Convertible Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument, face amount		$ 20,000,000									$ 110,000,000
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net loss attributable to TOI			$ (17,009,000)	$ (19,585,000)	$ (15,479,000)	$ (19,889,000)