SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Net (loss) income attributable to RadNet, Inc. common stockholders	$ (18,652)	$ 2,793	$ 3,044
BASIC NET (LOSS) INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	75,189,872	73,037,237	63,580,059
Basic net income per share attributable to RadNet, Inc. common stockholders (in dollars per share)	$ (0.25)	$ 0.04	$ 0.05
DILUTED NET (LOSS) INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	75,189,872	73,037,237	63,580,059
Add nonvested restricted stock subject only to service vesting (in shares)	0	296,849	202,995
Add additional shares issuable upon exercise of stock options, warrants and holdback shares (in shares)	0	1,428,246	875,245
Weighted average number of common shares outstanding during the period diluted (in shares)	75,189,872	74,762,332	64,658,299
Net (loss) income attributable to RadNet, Inc's common stockholders for diluted share calculation	$ (18,652)	$ 2,793	$ 3,044
Diluted net (loss) income per share attributable to RadNet, Inc. common stockholders (in dollars per share)	$ (0.25)	$ 0.04	$ 0.05
Nonvested 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)	920,249	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)	849,518	0	754,131
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	0	70,760