2. SUMMARY OF ACCOUNTING POLICIES (Details - Earnings Per Share) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income attributable to Radnet, Inc.'s common stockholders	$ 881	$ 7,987	$ 3,395	$ (4,554)	$ 4,205	$ 4,451	$ 5,144	$ (12,424)	$ 7,709	$ 1,376	$ 2,120
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average shares outstanding - Basic	45,454,000	43,637,000	43,370,000	42,747,000	41,783,000	41,645,000	40,817,000	40,010,000	43,805,794	41,070,077	39,140,480
Basic net income per share attributable to Radnet, Inc.'s common stockholders	$ .02	$ .18	$ .08	$ (.11)	$ 0.10	$ 0.11	$ 0.13	$ (0.31)	$ 0.18	$ 0.03	$ .05
DILUTED NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average shares outstanding during the period	45,454,000	43,637,000	43,370,000	42,747,000	41,783,000	41,645,000	40,817,000	40,010,000	43,805,794	41,070,077	39,140,480
Add nonvested restricted stock subject only to service vesting									865,326	994,610	316,905
Add additional shares issuable upon exercise of stock options and warrants									500,252	1,084,509	357,150
Weighted average shares outstanding - Diluted	46,545,000	44,752,000	44,686,000	42,747,000	44,182,000	44,034,000	43,263,000	40,010,000	45,171,372	43,149,196	39,814,535
Diluted net income per share attributable to RadNet, Inc.'s common stockholders	$ .02	$ .18	$ .08	$ (.11)	$ 0.10	$ 0.10	$ 0.13	$ (0.31)	$ .17	$ 0.03	$ .05