SUMMARY OF ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Balance Sheet Data:
Current assets	$ 32,401		$ 28,317
Noncurrent assets	62,564		45,912
Current liabilities	(9,383)		(4,300)
Noncurrent liabilities	(20,113)		(4,898)
Total net assets	65,469		65,031
Book value of RadNet joint venture interests	30,421		30,030
Cost in excess of book value of acquired joint venture interests	6,447		7,943
Total value of Radnet joint venture interests	36,868		37,973
Total book value of other joint venture partner interests	35,048		$ 35,001
Net revenue	80,115	$ 136,413
Net income	$ 13,718	$ 20,271