SIGNIFICANT ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Current assets	$ 334,919		$ 334,919		$ 270,424
Current liabilities	(381,267)		(381,267)		(398,114)
Total value of RadNet joint venture interests	41,375		41,375		34,528
Net revenue	333,918	$ 190,566	649,237	$ 472,130
Net income	8,087	$ (8,960)	21,862	(22,958)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Current assets	39,925		39,925		27,085
Noncurrent assets	68,699		68,699		68,686
Current liabilities	(12,165)		(12,165)		(12,545)
Noncurrent liabilities	(21,605)		(21,605)		(21,582)
Total net assets	74,854		74,854		61,644
Book value of RadNet joint venture interests	34,901		34,901		28,079
Cost in excess of book value of acquired joint venture interests and other	6,474		6,474		6,449
Total value of RadNet joint venture interests	$ 41,375		41,375		$ 34,528
Net revenue			64,636	43,849
Net income			$ 10,258	$ 6,001