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4. EARNINGS PER SHARE (Tables) | 3 Months Ended
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Mar. 31, 2013
Earnings Per Share [Abstract] |
EARNINGS PER SHARE |
|  | Three Months Ended |
|  | March 31, |
|  | 2013 |  |  | 2012 |
Net loss attributable to RadNet, Inc.'s common stockholders |  | $ | (1,342 | ) |  | $ | (111 | )
BASIC AND DILUTED NET LOSS PER SHARE ATTRIBUTABLE TO RADNET, INC.'S COMMON STOCKHOLDERS |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding during the period |  |  | 39,314,447 |  |  |  | 37,669,921 |
Basic and diluted net loss per share attributable to RadNet, Inc.'s common stockholders |  | $ | (0.03 | ) |  | $ | (0.00 | )

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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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