BUSINESS COMBINATIONS AND RELATED ACTIVITY (Details - Assets and Liabilities Assumed) $ in Thousands	Nov. 01, 2022 USD ($) loan shares	Aug. 24, 2021 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 09, 2022 USD ($)	Dec. 01, 2022 USD ($)	Oct. 01, 2022 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 06, 2021 USD ($)	Dec. 01, 2021 USD ($)	Jun. 01, 2021 USD ($)	May 01, 2021 USD ($)	Apr. 01, 2021 USD ($)	Mar. 01, 2021 USD ($)	Feb. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 677,665					$ 513,820								$ 472,879
I F R C L L C Subsidiary One
Business Acquisition [Line Items]
Total Purchase Consideration							$ 8,200
Property & Equipment							2,910
Right of Use Assets							1,703
Goodwill							5,271
Other							19
Right of Use Liabilities							(1,703)
Intangible assets							0
I F R C L L C Subsidiary Two
Business Acquisition [Line Items]
Total Purchase Consideration							4,800
Property & Equipment							2,103
Right of Use Assets							857
Goodwill							2,697
Other							0
Right of Use Liabilities							(857)
Intangible assets							$ 0
Montclair Radiological Associates, P.A.
Business Acquisition [Line Items]
Total Purchase Consideration						$ 94,877
Property & Equipment						16,414
Right of Use Assets						4,665
Goodwill						79,690
Other						(2,168)
Right of Use Liabilities						(4,124)
Contingent consideration to guarantee share value issued						1,200
Intangible assets						$ 400
Heart and Lung Imaging Limited
Business Acquisition [Line Items]
Total Purchase Consideration	$ 32,000
Property & Equipment	0
Right of Use Assets	0
Goodwill	16,200
Other	0
Right of Use Liabilities	0
Contingent consideration to guarantee share value issued	$ 10,800		11,656					0
Shares issued (in shares) | shares	359,002
Intangible assets	$ 15,800
Chelsea Dignostic Radiology, P.C.
Business Acquisition [Line Items]
Total Purchase Consideration					$ 2,800
Property & Equipment					568
Right of Use Assets					0
Goodwill					2,132
Other					0
Right of Use Liabilities					0
Intangible assets					$ 100
North Jersey Imaging Center, LLC
Business Acquisition [Line Items]
Total Purchase Consideration				$ 104
Property & Equipment				20
Right of Use Assets				0
Goodwill				55
Other				4
Right of Use Liabilities				0
Intangible assets				$ 25
I F R C L L C
Business Acquisition [Line Items]
Number of subsidiaries acquired | loan	3
I F R C L L C | Joint Venture With Calvert Medical Imaging Centers LLC
Business Acquisition [Line Items]
Number of subsidiaries acquired | loan	1
Personal Health Imaging PLLC
Business Acquisition [Line Items]
Total Purchase Consideration															$ 2,995
Property & Equipment															576
Right of Use Assets															608
Goodwill															2,355
Other															14
Right of Use Liabilities															(608)
Intangible assets															50
ZP Elmont LLC
Business Acquisition [Line Items]
Total Purchase Consideration															2,194
Property & Equipment															1,112
Right of Use Assets															0
Goodwill															1,005
Other															27
Right of Use Liabilities															0
Intangible assets															50
ZP Freeport LLC
Business Acquisition [Line Items]
Total Purchase Consideration															6,065
Property & Equipment															4,668
Right of Use Assets															0
Goodwill															1,328
Other															29
Right of Use Liabilities															0
Intangible assets															40
Broadway Medical Imaging LLC
Business Acquisition [Line Items]
Total Purchase Consideration															1,155
Property & Equipment															1,076
Right of Use Assets															446
Goodwill															6
Other															23
Right of Use Liabilities															(446)
Intangible assets															50
3235 Hempstead LLC
Business Acquisition [Line Items]
Total Purchase Consideration															9,386
Property & Equipment															5,667
Right of Use Assets															0
Goodwill															3,649
Other															0
Right of Use Liabilities															0
Intangible assets															70
SLZM Realty LLC
Business Acquisition [Line Items]
Total Purchase Consideration															13,671
Property & Equipment															4,617
Right of Use Assets															0
Goodwill															8,974
Other															0
Right of Use Liabilities															0
Intangible assets															80
2012 Sunrise Merrick LLC
Business Acquisition [Line Items]
Total Purchase Consideration															11,428
Property & Equipment															2,741
Right of Use Assets															335
Goodwill															8,617
Other															0
Right of Use Liabilities															(335)
Intangible assets															$ 70
ZP Bayside LLC
Business Acquisition [Line Items]
Total Purchase Consideration														$ 3,545
Property & Equipment														3,385
Right of Use Assets														2,191
Goodwill														40
Other														70
Right of Use Liabilities														(2,191)
Intangible assets														50
ZP Laurelton LLC
Business Acquisition [Line Items]
Total Purchase Consideration														2,658
Property & Equipment														2,530
Right of Use Assets														1,418
Goodwill														32
Other														46
Right of Use Liabilities														(1,418)
Intangible assets														50
ZP Smith LLC
Business Acquisition [Line Items]
Total Purchase Consideration														3,978
Property & Equipment														3,581
Right of Use Assets														2,214
Goodwill														347
Other														0
Right of Use Liabilities														(2,214)
Intangible assets														$ 50
ZP 907 Northern LLC
Business Acquisition [Line Items]
Total Purchase Consideration													$ 562
Property & Equipment													507
Right of Use Assets													1,817
Goodwill													5
Other													0
Right of Use Liabilities													(1,817)
Intangible assets													$ 50
William M. Kelly MD, Inc.
Business Acquisition [Line Items]
Total Purchase Consideration								2,346	$ 4,404			$ 3,750
Property & Equipment								99	701			990
Right of Use Assets								323	0			1,379
Goodwill								2,197	3,653			2,710
Other								0	0			0
Right of Use Liabilities								(323)	0			(1,379)
Intangible assets								50	$ 50			50
60th Street MRI, LLC
Business Acquisition [Line Items]
Total Purchase Consideration												400
Property & Equipment												85
Right of Use Assets												0
Goodwill												290
Other												0
Right of Use Liabilities												0
Intangible assets												25
ZP Parkchester LLC
Business Acquisition [Line Items]
Total Purchase Consideration												263
Property & Equipment												213
Right of Use Assets												311
Goodwill												0
Other												0
Right of Use Liabilities												(311)
Intangible assets												$ 50
ZP Eastern LLC
Business Acquisition [Line Items]
Total Purchase Consideration											$ 2,868
Property & Equipment											2,801
Right of Use Assets											1,951
Goodwill											17
Other											0
Right of Use Liabilities											(1,951)
Intangible assets											$ 50
Tangent Associates LLC
Business Acquisition [Line Items]
Total Purchase Consideration		$ 2,025
Property & Equipment		10
Right of Use Assets		0
Goodwill		379
Other		0
Right of Use Liabilities		$ 0
Shares issued (in shares) | shares		67,658,000
Intangible assets		$ 1,636
Mid Delaware Imaging P.A.
Business Acquisition [Line Items]
Total Purchase Consideration										$ 6,023
Property & Equipment										590
Right of Use Assets										0
Goodwill										5,260
Other										23
Right of Use Liabilities										0
Intangible assets										$ 150
Business Acquisitions
Business Acquisition [Line Items]
Total Purchase Consideration			142,781					79,716
Property & Equipment			22,015					35,949
Right of Use Assets			7,225					12,993
Goodwill			106,045					40,864
Other			(2,145)					232
Right of Use Liabilities			(6,684)					(12,993)
Intangible assets			$ 16,325					$ 2,671