CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY DEFICIT (USD $) In Thousands, except Share data	Common Stock	Additional Paid-In Capital	Retained Earnings / Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total RadNet, Inc.’s Equity Deficit	Noncontrolling Interest	Total
Beginning Balance, Amount at Dec. 31, 2009	$ 4	$ 156,758	$ (229,989)	$ (1,588)	$ (74,815)	$ 54	$ (74,761)
Beginning Balance, Shares at Dec. 31, 2009	36,259,279
Issuance of common stock to sellers of Truxtun Imaging, Amount		1,238			1,238		1,238
Issuance of common stock to sellers of Truxtun Imaging, Shares	375,000
Issuance of common stock to sellers of Union Imaging, Amount		153			153		153
Issuance of common stock to sellers of Union Imaging, Shares	75,000
Issuance of warrant to sellers of Rutherford Imaging		306			306		306
Issuance of common stock upon exercise of options/warrants, Amount		271			271		271
Issuance of common stock upon exercise of options/warrants, Shares	514,196
Stock-based compensation		3,718			3,718		3,718
Non-controlling interests assumed from the acquisition of Progressive imaging						(33)	(33)
Dividends paid to noncontrolling interests						(131)	(131)
Change in cumulative foreign currency translation adjustment				6	6		6
Change in fair value of cash flow hedge				(1,472)	(1,472)		(1,472)
Change in fair value of cash flow hedge from prior periods reclassified to earnings				917	917		917
NET INCOME (LOSS)			(12,852)		(12,852)	167	(12,685)
Ending Balance, Amount at Dec. 31, 2010	4	162,444	(242,841)	(2,137)	(82,530)	57	(82,473)
Ending Balance, Shares at Dec. 31, 2010	37,223,475
Issuance of common stock upon exercise of options/warrants, Amount		242			242		242
Issuance of common stock upon exercise of options/warrants, Shares	202,985
Stock-based compensation		3,110			3,110		3,110
Noncontrolling interests assumed from Radar joint venture						961	961
Purchase of non-controlling interests						(26)	26
Distributions paid to noncontrolling interests						(154)	(154)
Change in cumulative foreign currency translation adjustment				(34)	(34)		(34)
Change in fair value of cash flow hedge
Change in fair value of cash flow hedge from prior periods reclassified to earnings				1,225	1,225		1,225
NET INCOME (LOSS)			7,231		7,231	111	7,342
Ending Balance, Amount at Dec. 31, 2011	4	165,796	(235,610)	(946)	(70,756)	949	(69,807)
Ending Balance, Shares at Dec. 31, 2011	37,426,460
Issuance of common stock upon exercise of options/warrants, Shares	74,022
Stock-based compensation		2,736			2,736		2,736
Purchase of non-controlling interests		(117)			(117)		(117)
Dividends paid to noncontrolling interests						(71)	(71)
De-consolidation of joint venture						(14)	(14)
Issuance of restricted stock, Shares	1,040,000
Change in cumulative foreign currency translation adjustment				67	67		67
Change in fair value of cash flow hedge
Change in fair value of cash flow hedge from prior periods reclassified to earnings				918	918		918
NET INCOME (LOSS)			64,517		64,517	(230)	64,287
Ending Balance, Amount at Dec. 31, 2012	$ 4	$ 168,415	$ (171,093)	$ 39	$ (2,635)	$ 634	$ (2,001)
Ending Balance, Shares at Dec. 31, 2012	38,540,482