SUMMARY OF ACCOUNTING POLICIES (Details - Earnings Per Share) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounting Policies [Abstract]
Net income (loss) attributable to RadNet, Inc.'s common stockholders	$ 9,458	$ (16,358)
BASIC NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	51,951,506	50,294,329
Basic net income (loss) per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.18	$ (0.33)
Nonvested restricted stock subject only to service vesting (in shares)	253,265	0
Additional shares issuable upon exercise of stock options and warrants (in shares)	624,170	0
Weighted average number of common shares used in calculating diluted net income per share (in shares)	52,828,941	50,294,329
Diluted net income per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.18	$ (0.33)
Nonvested restricted stock subject to service vesting
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	82,595	527,899
Restricted Stock
Nonvested restricted stock subject to service vesting
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	0	314,962