2. SUMMARY OF ACCOUNTING POLICIES (Details - Earnings Per Share) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income attributable to Radnet, Inc. common stockholders	$ 3,226	$ 1,644	$ 7,326	$ 3,869
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average shares outstanding - Basic	46,953,705	45,868,629	46,760,583	46,337,993
Basic net income per share attributable to Radnet, Inc. common stockholders	$ 0.07	$ 0.04	$ 0.16	$ 0.08
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average shares outstanding during the period - Basic	46,953,705	45,868,629	46,760,583	46,337,993
Add nonvested restricted stock subject only to service vesting	315,830	260,389	237,595	190,428
Add additional shares issuable upon exercise of stock options and warrants	308,216	204,952	241,183	220,415
Weighted average shares outstanding - Diluted	47,577,750	46,333,970	47,239,360	46,748,836
Diluted net income per share attributable to RadNet, Inc.'s common stockholders	$ 0.07	$ 0.04	$ 0.16	$ 0.08
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	0	165,000	225,050	272,084