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CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive (Loss) Income [Member] | Accumulated Deficit [Member] | Radnet, Inc. Stockholders Equity [Member] | Noncontrolling Interests [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance, shares at Dec. 31, 2014 | 42,825,676 |  |  |  |  |  |
Beginning balance, value at Dec. 31, 2014 | $ 4 | $ 177,750 | $ (112) | $ (172,280) | $ 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, value |  | 594 |  |  | 594 |  | 594
Stock-based compensation, value |  | 7,635 |  |  | 7,635 |  | 7,635
Issuance of restricted stock and other awards, shares | 1,014,423 |  |  |  |  |  |
Forfeiture of restricted stock, shares | (59,053) |  |  |  |  |  |
Issuance of stock for acquisition, shares | 1,665,045 |  |  |  |  |  |
Issuance of stock for acquisition, value |  | 9,241 |  |  | 9,241 |  | 9,241
Sale to noncontrolling interests, net of taxes |  | 2,077 |  |  | 2,077 | 1,348 | 3,425
Distributions paid to noncontrolling interests |  |  |  |  |  | (729) | (729)
Change in cumulative foreign currency translation adjustment |  |  | (41) |  | (41) |  | (41)
Change in fair value of cash flow hedge, net of taxes |  |  |  |  |  |  | 0
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 | (153) | (164,571) | 32,577 | 3,884 | 36,461
Cumulative effect of accounting change due to adoption of ASU 2016-09 |  |  |  | 7,130 | 7,130 |  | 7,130
Issuance of common stock upon exercise of options/warrants, shares | 314,448 |  |  |  |  |  |
Issuance of common stock upon exercise of options/warrants, value |  | 150 |  |  | 150 |  | 150
Stock-based compensation, value |  | 5,767 |  |  | 5,767 |  | 5,767
Issuance of restricted stock and other awards, shares | 937,803 |  |  |  |  |  |
Return of common stock, shares | (958,536) |  |  |  |  |  |
Return of common stock, value |  | (5,032) |  |  | (5,032) |  | (5,032)
Purchase of non-controlling interests |  | (495) |  |  | (495) | (599) | (1,094)
Sale to noncontrolling interests, net of taxes |  | 700 |  |  | 700 |  | 700
Distributions paid to noncontrolling interests |  |  |  |  |  | (492) | (492)
Change in cumulative foreign currency translation adjustment |  |  | (49) |  | (49) |  | (49)
Change in fair value of cash flow hedge, net of taxes |  |  | 508 |  | 508 |  | 508
Net income |  |  |  | 7,230 | 7,230 | 774 | 8,004
Ending balance, shares at Dec. 31, 2016 | 46,574,904 |  |  |  |  |  |
Ending balance, value at Dec. 31, 2016 | $ 4 | 198,387 | 306 | (150,211) | 48,486 | 3,567 | 52,053
Stock-based compensation, shares | 867,248 |  |  |  |  |  |
Stock-based compensation, value | $ 1 | 7,833 |  |  | 7,834 |  | 7,834
Issuance of stock for acquisition, shares | 281,763 |  |  |  |  |  |
Issuance of stock for acquisition, value |  | 2,500 |  |  | 2,500 |  | 2,500
Sale to noncontrolling interests, net of taxes |  | 3,541 |  |  | 3,541 |  | 3,541
Contributions from noncontrolling interests |  |  |  |  |  | 4,304 | 4,304
Distributions paid to noncontrolling interests |  |  |  |  |  | (1,528) | (1,528)
Change in cumulative foreign currency translation adjustment |  |  | 26 |  | 26 |  | 26
Change in fair value of cash flow hedge, net of taxes |  |  | (880) |  | (880) |  | (880)
Net income |  |  |  | 53 | 53 | 2,022 | 2,075
Ending balance, shares at Dec. 31, 2017 | 47,723,915 |  |  |  |  |  |
Ending balance, value at Dec. 31, 2017 | $ 5 | $ 212,262 | $ (548) | $ (150,158) | $ 61,561 | $ 8,365 | $ 69,925

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