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CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive (Loss) Income | Accumulated Deficit | Radnet, Inc. Stockholders' Equity | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2016 |  | 46,574,904 |  |  |  |  |
Beginning balance, value at Dec. 31, 2016 | $ 52,053 | $ 4 | $ 198,387 | $ 306 | $ (150,211) | $ 48,486 | $ 3,567
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Stock-based compensation (in shares) |  | 867,248 |  |  |  |  |
Stock-based compensation | 7,834 | $ 1 | 7,833 |  |  | 7,834 |
Non cash severance | 1,047 |  |  |  |  |  |
Issuance of stock for acquisitions (in shares) |  | 281,763 |  |  |  |  |
Issuance of stock for acquisitions | 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 | 2,075 |  |  |  | 53 | 53 | 2,022
Ending balance, value at Dec. 31, 2017 | 69,925 | $ 5 | 212,261 | (548) | (150,158) | 61,560 | 8,365
Ending balance (in shares) at Dec. 31, 2017 |  | 47,723,915 |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2016 |  | 46,574,904 |  |  |  |  |
Beginning balance, value at Dec. 31, 2016 | 52,053 | $ 4 | 198,387 | 306 | (150,211) | 48,486 | 3,567
Ending balance, value at Dec. 31, 2018 | 200,253 | $ 5 | 242,835 | 2,259 | (117,915) | 127,184 | 73,069
Ending balance (in shares) at Dec. 31, 2018 |  | 48,977,485 |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2017 |  | 47,723,915 |  |  |  |  |
Beginning balance, value at Dec. 31, 2017 | 69,925 | $ 5 | 212,261 | (548) | (150,158) | 61,560 | 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 | $ 0 | 7,719 |  |  | 7,719 |
Forfeiture of restricted stock (in shares) |  | (1,150) |  |  |  |  |
Forfeiture of restricted stock | (7) |  | (7) |  |  | (7) |
Non cash severance | 0 |  |  |  |  |  |
Purchase of noncontrolling interests | (200) |  | (43) |  |  | (43) | (157)
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)
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 |
Net income | 38,133 |  |  |  | 32,243 | 32,243 | 5,890
Ending balance, value at Dec. 31, 2018 | 200,253 | $ 5 | 242,835 | 2,259 | (117,915) | 127,184 | 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 (in shares) |  | 12,692 |  |  |  |  |
Non cash severance | 188 |  | 188 |  |  |  |
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) |
Net income | 23,440 |  |  |  | 14,756 | 14,756 | 8,684
Ending balance, value at Dec. 31, 2019 | $ 233,139 | $ 5 | $ 262,865 | $ (8,026) | $ (103,159) | $ 151,685 | $ 81,454
Ending balance (in shares) at Dec. 31, 2019 |  | 50,314,328 |  |  |  |  |

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