SIGNIFICANT ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Current assets	$ 288,696		$ 324,264
Current liabilities	(381,298)		(374,784)
Total value of RadNet joint venture interests	44,746		42,229
Net revenue	341,767	$ 315,319
Net income	8,363	13,775
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Current assets	37,119		37,186
Noncurrent assets	83,407		73,592
Current liabilities	(12,722)		(12,919)
Noncurrent liabilities	(27,298)		(22,370)
Total net assets	80,506		75,489
Book value of RadNet joint venture interests	37,214		34,930
Cost in excess of book value of acquired joint venture interests and other	7,532		7,299
Total value of RadNet joint venture interests	44,746		$ 42,229
Net revenue	34,411	31,718
Net income	$ 5,035	$ 4,803