SUMMARY OF ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Balance Sheet Data:
Current assets	$ 33,301		$ 28,317
Noncurrent assets	59,804		45,912
Noncurrent liabilities	(8,244)		(4,300)
Noncurrent liabilities	(15,881)		(4,898)
Total net assets	68,980		65,031
Book value of RadNet joint venture interests	31,738		30,030
Cost in excess of book value of acquired joint venture interests	7,974		7,943
Total value of Radnet joint venture interests	39,712		37,973
Total book value of other joint venture partner interests	37,242		$ 35,001
Net revenue	27,254	$ 44,546
Net income	$ 3,952	$ 6,250