SUMMARY OF ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Balance Sheet Data:
Current assets	$ 26,618		$ 27,427
Noncurrent assets	70,576		61,037
Current liabilities	(10,487)		(9,217)
Noncurrent liabilities	(22,751)		(18,872)
Total net assets	63,956		60,375
Book value of RadNet joint venture interests	29,121		28,001
Cost in excess of book value of acquired joint venture interests and other	6,450		6,469
Total value of Radnet joint venture interests	35,571		34,470
Total book value of other joint venture partner interests	34,835		$ 32,374
Net revenue	78,988	$ 80,115
Net income	$ 13,651	$ 13,718