5. EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income (loss) attributable to RadNet, Inc.'s common stockholders	$ (1,723)	$ (4,554)
BASIC AND DILUTED NET LOSS PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period	46,581,491	42,747,329
Basic and diluted net loss per shares attributable to RadNet, Inc. common stockholders	$ (0.04)	$ (0.11)