Net Loss Per Share - Summary of Basic and Diluted Net Loss Per Share to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Abstract]
Net loss attributable to TOI	$ (19,585)	$ (19,889)
Less: Deemed dividend	0	0
Net loss attributable to TOI available for distribution	(19,585)	(19,889)
Net loss attributable to participating securities, basic	(3,510)	(3,617)
Net loss attributable to participating securities, diluted	(3,510)	(3,617)
Net loss attributable to common stockholders, basic	(16,075)	(16,272)
Net loss attributable to common stockholders, diluted	$ (16,075)	$ (16,272)
Weighted average common shares outstanding, basic (in shares)	77,098,825	74,234,287
Weighted average common shares outstanding, diluted (in shares)	77,098,825	74,234,287
Net loss income per share attributable to common stockholders, basic (in usd per share)	$ (0.21)	$ (0.22)
Net loss income per share attributable to common stockholders, diluted (in usd per share)	$ (0.21)	$ (0.22)