SUMMARY OF ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Balance Sheet Data:
Current assets	$ 29,707		$ 28,317
Noncurrent assets	67,608		45,912
Noncurrent liabilities	(9,038)		(4,300)
Noncurrent liabilities	(22,037)		(4,898)
Total net assets	66,240		65,031
Book value of RadNet joint venture interests	30,634		30,030
Cost in excess of book value of acquired joint venture interests	7,987		7,943
Total value of Radnet joint venture interests	38,621		37,973
Total book value of other joint venture partner interests	35,606		$ 35,001
Net revenue	55,624	$ 91,559
Net income	$ 8,723	$ 14,174