2. SUMMARY OF ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Key financial data for joint ventures
Current assets	$ 41,059		$ 40,093
Noncurrent assets	106,421		100,146
Current liabilities	(16,342)		(14,077)
Noncurrent liabilities	(42,680)		(44,405)
Total net assets	88,458		81,757
Book value of Radnet joint venture interests	42,012		38,538
Cost in excess of book value of acquired joint venture interests	6,488		4,970
Total value of Radnet joint venture interests	48,500		43,509
Total book value of other joint venture partner interests	46,446		$ 43,219
Net revenue	86,981	$ 80,917
Net income	$ 10,285	$ 13,044