SIGNIFICANT ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Current assets	$ 324,505		$ 324,505		$ 324,264
Current liabilities	(409,223)		(409,223)		(374,784)
Total value of RadNet joint venture interests	52,020		52,020		42,229
Net revenue	350,044	$ 332,690	1,046,185	$ 981,928
Net income	6,447	$ 21,144	28,640	43,005
Joint Venture Interest
Schedule of Equity Method Investments [Line Items]
Total net assets	95,447		95,447		75,489
Book value of RadNet joint venture interests	43,947		43,947		34,930
Cost in excess of book value of acquired joint venture interests and other	8,073		8,073		7,299
Total value of RadNet joint venture interests	52,020		52,020		42,229
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Current assets	48,154		48,154		37,186
Noncurrent assets	86,123		86,123		73,592
Current liabilities	(12,211)		(12,211)		(12,919)
Noncurrent liabilities	$ (26,619)		(26,619)		$ (22,370)
Net revenue			107,241	98,193
Net income			$ 17,034	$ 16,007