Business Combinations - Additional Information (Details) $ / shares in Units, $ in Thousands											3 Months Ended		6 Months Ended		12 Months Ended
	May 19, 2022 USD ($)	May 01, 2022 USD ($)	Apr. 30, 2022 USD ($) installment	Feb. 12, 2022 USD ($)	Dec. 09, 2021 USD ($) installment	Nov. 19, 2021 USD ($) installment	Nov. 12, 2021 USD ($) installment vote $ / shares shares	Jun. 28, 2021 USD ($) $ / shares shares	May 01, 2021 USD ($) installment	Feb. 12, 2021 USD ($) installment	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) vote	Jun. 30, 2021 USD ($)	Dec. 31, 2021 businessCombination asset_acquisition	Dec. 12, 2021 shares
Business Acquisition [Line Items]
Number of businesses acquired | businessCombination															5
Number of asset acquisition | asset_acquisition															1
Sale of stock, price per share (in usd per share) | $ / shares								$ 10.00
Consideration received on transaction								$ 275,000
Reverse recapitalization, net							$ 762,052
Reverse recapitalization, equity consideration, value							$ 595,468
Reverse recapitalization, equity consideration (in shares) | shares							51,300,000
Reverse recapitalization, equity consideration (in dollars per share) | $ / shares							$ 10.00
Cash acquired through reverse recapitalization							$ 166,584
Proceeds from recapitalization transaction							333,946
Payments as a result of recapitalization transaction							167,510
Reverse recapitalization expenses							39,914
Accrued reverse recapitalization costs							$ 6,769
Number of common stock, vote per share | vote							1						1
Recapitalization exchange ratio							591
Adjustments to additional paid in capital, reverse recapitalization							$ 142,557
Payment of deferred consideration liability for acquisition													$ 759	$ 0
Acquisition and integration expenses paid											$ 111	$ 107	533	$ 197
Common stock
Business Acquisition [Line Items]
Sale of stock issued (in shares) | shares								17,500,000
Preferred stock
Business Acquisition [Line Items]
Sale of stock issued (in shares) | shares								100,000
Public Warrants
Business Acquisition [Line Items]
Number of securities called by each warrant (in shares) | shares							1									1
Derivative Warrant Liability
Business Acquisition [Line Items]
Class of warrant forfeited (in warrants) | shares							555,791
Legacy TOI Earnout Shares
Business Acquisition [Line Items]
Contingent consideration, liability (in shares) | shares							12,500,000
Oncology Association PA
Business Acquisition [Line Items]
Weighted average useful life						2 years			10 years
Fair value of total consideration transferred									$ 500
Cash consideration									200
Asset acquisition, deferred cash consideration		$ 100							$ 300
Number of installments | installment									3
Raiker
Business Acquisition [Line Items]
Total consideration transferred										$ 1,710
Cash										892
Deferred consideration										$ 818
Number of installments | installment										2
Payment of deferred consideration liability for acquisition				$ 409
Intangibles assets acquired										$ 0
Cumulative revenue													2,370
Cumulative net loss													$ 230
Grant
Business Acquisition [Line Items]
Total consideration transferred							$ 1,049
Cash							849
Deferred consideration							$ 200
Number of installments | installment							2
Intangibles assets acquired							$ 450
Weighted average useful life							5 years
Orr
Business Acquisition [Line Items]
Total consideration transferred							$ 1,016
Cash							816
Deferred consideration							$ 200
Number of installments | installment							2
Intangibles assets acquired							$ 150
Weighted average useful life							5 years
Dave
Business Acquisition [Line Items]
Total consideration transferred						$ 2,750
Cash						2,000
Deferred consideration	$ 250					$ 750
Number of installments | installment						3
Intangibles assets acquired						$ 77
Yang
Business Acquisition [Line Items]
Total consideration transferred					$ 7,115
Cash					4,615
Deferred consideration					$ 2,500
Number of installments | installment					2
Intangibles assets acquired					$ 68
Weighted average useful life					5 years
Perkins
Business Acquisition [Line Items]
Total consideration transferred			$ 10,920
Cash			8,920
Deferred consideration			$ 2,000
Number of installments | installment			2
Intangibles assets acquired			$ 2,550
Perkins | Trade names
Business Acquisition [Line Items]
Intangibles assets acquired			$ 2,480
Weighted average useful life			10 years
Perkins | Clinical contracts
Business Acquisition [Line Items]
Intangibles assets acquired			$ 70
Weighted average useful life			5 years