SIGNIFICANT ACCOUNTING POLICIES - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounting Policies [Abstract]
Net income attributable to RadNet, Inc.'s common stockholders	$ (21,005)	$ 3,013
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	57,701,439	55,303,007
Basic net income (loss) per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ (0.36)	$ 0.05
Nonvested restricted stock subject only to service vesting (in shares)	0	197,911
Add additional shares issuable upon exercise of stock options and contingently issuable shares (in shares)	0	861,275
Weighted average number of common shares used in calculating diluted net income per share (in shares)	57,701,439	56,362,193
Diluted net income per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ (0.36)	$ 0.05
Fair value change for contingently issuable shares excluded from the computation of diluted per share amounts as its effect would be antidilutive	$ 769	$ 0
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)	594,758	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)	750,075	46,912
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)	273,111	0