SUMMARY OF ACCOUNTING POLICIES (Details - Earnings Per Share) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Net income attributable to RadNet, Inc.'s common stockholders	$ 3,195	$ 5,039	$ 4,360	$ 3,107
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	49,807,460	48,010,726	49,597,138	47,937,215
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS (in dollars per share)	$ 0.06	$ 0.10	$ 0.09	$ 0.06
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
WEIGHTED AVERAGE SHARES OUTSTANDING Basic (in shares)	49,807,460	48,010,726	49,597,138	47,937,215
Add nonvested restricted stock subject only to service vesting (in shares)	200,567	180,269	191,375	171,627
Add additional shares issuable upon exercise of stock options and warrants (in shares)	352,333	424,397	324,793	372,463
WEIGHTED AVERAGE SHARES OUTSTANDING Diluted (in shares)	50,360,360	48,615,392	50,113,306	48,481,305
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS (in dollars per share)	$ 0.06	$ 0.10	$ 0.09	$ 0.06
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	8,333