SIGNIFICANT ACCOUNTING POLICIES (Details - Revenue) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	$ 190,566	$ 289,097	$ 472,130	$ 560,647
Total revenue	190,566	289,097	472,130	560,647
Commercial insurance
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	96,349	160,185	251,711	311,899
Medicare
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	35,082	60,151	92,587	114,280
Medicaid
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	4,300	7,295	10,980	14,423
Workers' compensation/personal injury
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	7,359	11,014	17,916	22,062
Other patient revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	3,549	6,017	9,217	11,858
Management fee revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	3,332	1,753	5,899	3,870
Teleradiology and Software revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	2,200	4,063	5,971	8,449
Other
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	3,527	7,693	9,750	14,003
Service fee revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	155,698	258,171	404,031	500,844
Revenue under capitation arrangements
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	$ 34,868	$ 30,926	$ 68,099	$ 59,803