CONSOLIDATED STATEMENT OF EQUITY (DEFICIT) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings / Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Radnet, Inc. Stockholders (Deficit) Equity [Member]	Noncontrolling Interest [Member]	Total
Beginning balance, shares at Dec. 31, 2012	38,540,482
Beginning balance, value at Dec. 31, 2012	$ 4	$ 168,415	$ (175,776)	$ 39	$ (7,318)	$ 634	$ (6,684)
Issuance of common stock upon exercise of options/warrants, shares	898,714
Issuance of common stock upon exercise of options/warrants	$ 0	469			469		469
Stock-based compensation		2,537			2,537		2,537
Sale of a noncontrolling interests		2,201			2,201	439	2,640
Purchase of non-controlling interests						979	979
Issuance of restricted stock, shares	650,000
Dividends paid to noncontrolling interests						(18)	(18)
Change in cumulative foreign currency translation adjustment				(89)	(89)		(89)
Net income			2,120		2,120	256	2,376
Ending balance, shares at Dec. 31, 2013	40,089,196
Ending balance, value at Dec. 31, 2013	$ 4	173,622	(173,656)	(50)	(80)	2,290	2,210
Issuance of common stock upon exercise of options/warrants, shares	1,579,695
Issuance of common stock upon exercise of options/warrants		1,546			1,546		1,546
Stock-based compensation		2,463			2,463		2,463
Sale of a noncontrolling interests						200	200
Purchase of non-controlling interests		119			119	(315)	(196)
Issuance of restricted stock, shares	1,156,785
Dividends paid to noncontrolling interests						(148)	(148)
Change in cumulative foreign currency translation adjustment				(62)	(62)		(62)
Net income			1,376		1,376	309	1,685
Ending balance, shares at Dec. 31, 2014	42,825,676
Ending balance, value at Dec. 31, 2014	$ 4	177,750	(172,280)	(112)	5,362	2,336	7,698
Issuance of common stock upon exercise of options/warrants, shares	835,098
Issuance of common stock upon exercise of options/warrants		594			594		594
Stock-based compensation		7,635			7,635		7,635
Sale of a noncontrolling interests		2,077			2,077	1,348	3,425
Purchase of non-controlling interests							(196)
Issuance of restricted stock, shares	1,014,423
Forfeiture of restricted stock	(59,053)
Issuance of stock for acquisition, shares	1,665,045
Issuance of stock for acquisition, value		9,241			9,241		9,241
Dividends paid to noncontrolling interests						(729)	(729)
Change in cumulative foreign currency translation adjustment				(41)	(41)		(41)
Net income			7,709		7,709	929	8,638
Ending balance, shares at Dec. 31, 2015	46,281,189
Ending balance, value at Dec. 31, 2015	$ 4	$ 197,297	$ (164,571)	$ (153)	$ 32,577	$ 3,884	$ 36,461