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2. SIGNIFICANT ACCOUNTING POLICIES (Details - Revenue) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Service fee revenue, net of contractual allowances and discounts		$ 204,168	$ 212,750
Provision for bad debts		0	(11,646)
Net service fee revenue		204,168	201,104
Revenue under capitation arrangements		27,224	27,909
Total net revenue		231,392	229,013
Commercial Insurance [Member]
Service fee revenue, net of contractual allowances and discounts		136,415	140,995
Medicare [Member]
Service fee revenue, net of contractual allowances and discounts		45,609	47,678
Medicaid [Member]
Service fee revenue, net of contractual allowances and discounts		6,258	6,733
Workers' Compensation/Personal Injury [Member]
Service fee revenue, net of contractual allowances and discounts		8,724	9,057
Other [Member]
Service fee revenue, net of contractual allowances and discounts	[1]	$ 7,162	$ 8,287
[1] Other consists of revenue from teleradiology services, consulting fees and software revenue.

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Revenue under capitation arrangements

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Amount of patient service revenue, net of contractual allowances and discounts, less the related provision for bad debts.

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Amount of patient service revenue recognized, net of contractual allowances and discounts, less the provision for bad debts related to patient service revenue plus all other revenue.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

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