SIGNIFICANT ACCOUNTING POLICIES - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accounting Policies [Abstract]
Net income attributable to RadNet, Inc.'s common stockholders	$ 17,540	$ 668	$ 4,904	$ 11,585
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	67,793,404	56,744,419	62,113,707	56,041,017
Basic net income per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.26	$ 0.01	$ 0.08	$ 0.21
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	67,793,404	56,744,419	62,113,707	56,041,017
Add non-vested restricted stock subject only to service vesting (in shares)	217,238	179,268	202,082	141,492
Add additional shares issuable upon exercise of stock options and contingently issuable shares (in shares)	799,176	728,074	905,462	853,908
Weighted average number of common shares used in calculating diluted net income per share (in shares)	68,809,818	57,651,761	63,221,251	57,036,417
Changes in FV associated with contingently issuable shares	$ 0	$ 0	$ 0	$ (586)
Net income attributable to RadNet, Inc's common stockholders for diluted share calculation	$ 17,540	$ 668	$ 4,904	$ 10,999
Diluted net income per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.25	$ 0.01	$ 0.08	$ 0.19
Earnings per share disclosures:
Fair value change for contingently issuable shares excluded from the computation of diluted per share amounts as its effect would be antidilutive	$ 0	$ 278	$ 0	$ 0
Non-vested restricted stock subject to service vesting
Stock options and non-vested restricted awards excluded from the computation of diluted per share amounts as their effect would be antidilutive:
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	0	0	0	0
Shares issuable upon the exercise of stock options
Stock options and non-vested restricted awards excluded from the computation of diluted per share amounts as their effect would be antidilutive:
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	88,600	84,885	761,708	67,289
Shares issuable subject to satisfaction of certain contingencies
Stock options and non-vested restricted awards excluded from the computation of diluted per share amounts as their effect would be antidilutive:
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	0	113,303	0	0
Weighted average shares for which the exercise price exceeds average market price of common stock
Stock options and non-vested restricted awards excluded from the computation of diluted per share amounts as their effect would be antidilutive:
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	0	83,972	94,346	73,094
Contingently issuable shares
Stock options and non-vested restricted awards excluded from the computation of diluted per share amounts as their effect would be antidilutive:
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	0	0	193,207	0