SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Net income attributable to RadNet, Inc. common stockholders	$ 2,793	$ 3,044	$ 10,650
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	73,037,237	63,580,059	56,293,336
Basic net income per share attributable to RadNet, Inc. common stockholders (in dollars per share)	$ 0.04	$ 0.05	$ 0.19
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	73,037,237	63,580,059	56,293,336
Add nonvested restricted stock subject only to service vesting (in shares)	296,849	202,995	172,139
Add additional shares issuable upon exercise of stock options, warrants and holdback shares (in shares)	1,428,246	875,245	855,395
Weighted average number of common shares used in calculating diluted net income per share (in shares)	74,762,332	64,658,299	57,320,870
Changes in fair value associated with contingently issuable shares	$ 0	$ 0	$ (724)
Net income attributable to RadNet, Inc's common stockholders for diluted share calculation	$ 2,793	$ 3,044	$ 9,926
Diluted net income per share attributable to RadNet, Inc. common stockholders (in dollars per share)	$ 0.04	$ 0.05	$ 0.17
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)	0	754,131	152,723
Weighted average shares for which the exercise price exceeds the 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	70,760	0