SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Balance Sheet Data:
Current assets	$ 27,427	$ 28,317
Noncurrent assets	61,037	45,912
Current liabilities	(9,217)	(4,300)
Noncurrent liabilities	(18,872)	(4,898)
Total net assets	60,375	65,031
Book value of RadNet joint venture interests	28,001	30,030
Cost in excess of book value of acquired joint venture interests accounted for as equity method goodwill	6,469	7,943
Total value of RadNet joint venture interests	34,470	37,973	$ 52,435
Total book value of other joint venture partner interests	32,374	35,001
Net revenue	108,051	155,820	188,849
Net Income From Joint Ventures	$ 18,624	$ 24,596	$ 28,644