CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Thousands	Total	DeepHealth, Inc.	Radnet, Inc. Stockholders' Equity	Radnet, Inc. Stockholders' Equity DeepHealth, Inc.	Common Stock	Common Stock DeepHealth, Inc.	Additional Paid-in Capital	Additional Paid-in Capital DeepHealth, Inc.	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2017					47,723,915
Beginning balance, value at Dec. 31, 2017	$ 69,925		$ 61,560		$ 5		$ 212,261		$ (548)	$ (150,158)	$ 8,365
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock upon exercise of options (in shares)					10,000
Issuance of stock upon exercise of options	20		20				20
Stock-based compensation (in shares)					713,160
Stock-based compensation	7,719		7,719				7,719
Forfeiture of restricted stock (in shares)					(1,150)
Forfeiture of restricted stock	(7)		(7)				(7)
Issuance of stock for acquisitions (in shares)					531,560
Issuance of stock for acquisitions	8,000		8,000				8,000
Sale to noncontrolling interests, net of taxes	34,657		11,991				11,991				22,666
Special distribution from noncontrolling interest	(6,281)		2,894				2,894				(9,175)
Purchase of noncontrolling interests	(200)		(43)				(43)				(157)
Contributions from noncontrolling interests	2,640										2,640
Distributions paid to noncontrolling interests	(1,427)										(1,427)
Re-measurement of noncontrolling interest upon change in control	44,267										44,267
Change in cumulative foreign currency translation adjustment	(69)		(69)						(69)
Change in fair value of cash flow hedge, net of taxes	2,876		2,876						2,876
Change in fair value of cash flow hedge, net of taxes	2,876
Change in fair value of cash flow hedge from prior periods reclassified to earnings	0
Net (loss) income	38,133		32,243							32,243	5,890
Ending balance, value at Dec. 31, 2018	200,253		127,184		$ 5		242,835		2,259	(117,915)	73,069
Ending balance (in shares) at Dec. 31, 2018					48,977,485
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock upon exercise of options (in shares)					12,500
Issuance of stock upon exercise of options	75		75				75
Stock-based compensation (in shares)					771,042
Stock-based compensation	8,735		8,735				8,735
Forfeiture of restricted stock (in shares)					(1,500)
Forfeiture of restricted stock	(5)		(5)				(5)
Non-cash severance	188		188				188
Non-cash severance (in shares)					12,692
Issuance of stock for acquisitions (in shares)					542,109
Issuance of stock for acquisitions	7,500		7,500				7,500
Sale to noncontrolling interests, net of taxes	5,545		3,537				3,537				2,008
Contributions from noncontrolling interests	750										750
Distributions paid to noncontrolling interests	(3,057)										(3,057)
Change in cumulative foreign currency translation adjustment	(32)		(32)						(32)
Change in fair value of cash flow hedge, net of taxes	(10,253)		(10,253)						(10,253)
Change in fair value of cash flow hedge from prior periods reclassified to earnings	0
Net (loss) income	23,440		14,756							14,756	8,684
Ending balance, value at Dec. 31, 2019	233,139		151,685		$ 5		262,865		(8,026)	(103,159)	81,454
Ending balance (in shares) at Dec. 31, 2019					50,314,328
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under the equity compensation plan (in shares)					491,674	10,920
Shares issued under the equity compensation plan	0	$ 0
Stock-based compensation	12,463		12,463				12,463
Issuance of stock for acquisitions (in shares)						823,615
Issuance of stock for acquisitions		$ 33,011		$ 33,011				$ 33,011
Tax effect on gain on sale of noncontrolling interest	(551)		(551)				(551)
Distributions paid to noncontrolling interests	(1,985)										(1,985)
Change in cumulative foreign currency translation adjustment	(101)		(101)						(101)
Change in fair value of cash flow hedge, net of taxes	(19,372)		(19,372)						(19,372)
Change in fair value of cash flow hedge from prior periods reclassified to earnings	3,448		3,448						3,448
Net (loss) income	(1,749)		(14,840)							(14,840)	13,091
Ending balance, value at Dec. 31, 2020	$ 258,303		$ 165,743		$ 5		$ 307,788		$ (24,051)	$ (117,999)	$ 92,560
Ending balance (in shares) at Dec. 31, 2020					51,640,537