SIGNIFICANT ACCOUNTING POLICIES (Details - Earnings Per Share) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounting Policies [Abstract]
Net income attributable to RadNet, Inc.'s common stockholders	$ 3,013	$ 9,458
BASIC NET INCOME PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period (in shares)	55,303,007	51,951,506
Basic net income (loss) per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.05	$ 0.18
Nonvested restricted stock subject only to service vesting (in shares)	197,911	253,265
Additional shares issuable upon exercise of stock options and warrants (in shares)	861,275	624,170
Weighted average number of common shares used in calculating diluted net income per share (in shares)	56,362,193	52,828,941
Diluted net income (loss) per share attributable to RadNet, Inc.'s common stockholders (in dollars per share)	$ 0.05	$ 0.18
Stock Options
Nonvested restricted stock subject to service vesting
Weighted average shares for which the exercise price exceeds average market price of common stock (in shares)	46,912	82,595