SUMMARY OF ACCOUNTING POLICIES (Details - Earnings Per Share) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Net income (loss) attributable to RadNet, Inc.'s common stockholders	$ 4,899	$ 5,406	$ 1,165	$ (1,932)
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)	49,702,869	47,969,003	49,490,234	47,896,216
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS (in dollars per share)	$ 0.10	$ 0.11	$ 0.02	$ (0.04)
DILUTED NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
WEIGHTED AVERAGE SHARES OUTSTANDING Basic (in shares)	49,702,869	47,969,003	49,490,234	47,896,216
Add nonvested restricted stock subject only to service vesting (in shares)	134,260	147,868	186,779	0
Add additional shares issuable upon exercise of stock options and warrants (in shares)	307,411	409,162	311,023	0
WEIGHTED AVERAGE SHARES OUTSTANDING Diluted (in shares)	50,144,540	48,526,033	49,988,036	47,896,216
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS (in dollars per share)	$ 0.10	$ 0.11	$ 0.02	$ (0.04)
Stock options excluded from the computation of diluted per share amounts:
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	0	0	0	0