2. SUMMARY OF ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Key financial data for joint ventures
Current assets	$ 40,898		$ 40,093
Noncurrent assets	107,657		100,146
Current liabilities	(17,383)		(14,077)
Noncurrent liabilities	(43,115)		(44,405)
Total net assets	88,057		81,757
Book value of Radnet joint venture interests	41,879		38,538
Cost in excess of book value of acquired joint venture interests	7,279		4,970
Total value of Radnet joint venture interests	49,158		43,509
Total book value of other joint venture partner interests	46,178		$ 43,219
Net revenue	133,108	$ 119,920
Net income	$ 16,034	$ 18,001