SUMMARY OF ACCOUNTING POLICIES (Details - Earnings Per Share) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accounting Policies [Abstract]
Net income (loss) attributable to RadNet, Inc.'s common stockholders	$ 6,156	$ 3,195	$ (20,797)	$ 4,360
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)	51,358,603	49,807,460	50,746,380	49,597,138
Basic net income (loss) per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.12	$ 0.06	$ (0.41)	$ 0.09
Nonvested restricted stock subject only to service vesting (in shares)	120,605	200,567		191,375
Additional shares issuable upon exercise of stock options and warrants (in shares)	476,607	352,333		324,793
Weighted average number of common shares used in calculating diluted net income per share (in shares)	51,955,815	50,360,360	50,746,380	50,113,306
Diluted net income per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.12	$ 0.06	$ (0.41)	$ 0.09
Nonvested restricted stock subject to service vesting
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	48,948	0	933,370	0
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	0	331,659	0