Summary of Significant Accounting Policies (Details)			3 Months Ended
	Mar. 24, 2025 USD ($)	Feb. 26, 2025 USD ($)	Mar. 31, 2025 USD ($) segment	Mar. 31, 2024 USD ($)	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			$ 39,739,000	$ 36,055,000	$ 49,669,000	$ 33,488,000
Accumulated deficit			(230,398,000)		(210,813,000)
Net loss attributable to TOI			(19,585,000)	(19,889,000)
Net cash used in operating			(4,988,000)	(15,883,000)
Common stock issued for options exercised			$ 137,000	73,000
Number of operating segments | segment			3
Number of reportable segments | segment			3
Allowance for credit losses			$ 0		$ 0
Goodwill impairment charges			$ 0
Reduction in SG&A expenses (as a percent)			11.00%
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			$ (19,585,000)	$ (19,889,000)