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CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Thousands | Total | DeepHealth, Inc. | Radnet, Inc. Stockholders' Equity | Radnet, Inc. Stockholders' Equity DeepHealth, Inc. | Common Stock | Common Stock DeepHealth, Inc. | Additional Paid-in Capital | Additional Paid-in Capital DeepHealth, Inc. | Accumulated Other Comprehensive (Loss) Income | Accumulated Deficit | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2017 |  |  |  |  | 47,723,915 |  |  |  |  |  |
Beginning balance, value at Dec. 31, 2017 | $ 69,925 |  | $ 61,560 |  | $ 5 |  | $ 212,261 |  | $ (548) | $ (150,158) | $ 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 |  | 7,719 |  |  |  | 7,719 |  |  |  |
Forfeiture of restricted stock (in shares) |  |  |  |  | (1,150) |  |  |  |  |  |
Forfeiture of restricted stock | (7) |  | (7) |  |  |  | (7) |  |  |  |
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)
Purchase of noncontrolling interests | (200) |  | (43) |  |  |  | (43) |  |  |  | (157)
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 |  |
Change in fair value of cash flow hedge, net of taxes | 2,876 |  |  |  |  |  |  |  |  |  |
Change in fair value of cash flow hedge from prior periods reclassified to earnings | 0 |  |  |  |  |  |  |  |  |  |
Net (loss) income | 38,133 |  | 32,243 |  |  |  |  |  |  | 32,243 | 5,890
Ending balance, value at Dec. 31, 2018 | 200,253 |  | 127,184 |  | $ 5 |  | 242,835 |  | 2,259 | (117,915) | 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 | 188 |  | 188 |  |  |  | 188 |  |  |  |
Non-cash severance (in shares) |  |  |  |  | 12,692 |  |  |  |  |  |
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) |  |
Change in fair value of cash flow hedge from prior periods reclassified to earnings | 0 |  |  |  |  |  |  |  |  |  |
Net (loss) income | 23,440 |  | 14,756 |  |  |  |  |  |  | 14,756 | 8,684
Ending balance, value at Dec. 31, 2019 | 233,139 |  | 151,685 |  | $ 5 |  | 262,865 |  | (8,026) | (103,159) | 81,454
Ending balance (in shares) at Dec. 31, 2019 |  |  |  |  | 50,314,328 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Shares issued under the equity compensation plan (in shares) |  |  |  |  | 491,674 | 10,920 |  |  |  |  |
Shares issued under the equity compensation plan | 0 | $ 0 |  |  |  |  |  |  |  |  |
Stock-based compensation | 12,463 |  | 12,463 |  |  |  | 12,463 |  |  |  |
Issuance of stock for acquisitions (in shares) |  |  |  |  |  | 823,615 |  |  |  |  |
Issuance of stock for acquisitions |  | $ 33,011 |  | $ 33,011 |  |  |  | $ 33,011 |  |  |
Tax effect on gain on sale of noncontrolling interest | (551) |  | (551) |  |  |  | (551) |  |  |  |
Distributions paid to noncontrolling interests | (1,985) |  |  |  |  |  |  |  |  |  | (1,985)
Change in cumulative foreign currency translation adjustment | (101) |  | (101) |  |  |  |  |  | (101) |  |
Change in fair value of cash flow hedge, net of taxes | (19,372) |  | (19,372) |  |  |  |  |  | (19,372) |  |
Change in fair value of cash flow hedge from prior periods reclassified to earnings | 3,448 |  | 3,448 |  |  |  |  |  | 3,448 |  |
Net (loss) income | (1,749) |  | (14,840) |  |  |  |  |  |  | (14,840) | 13,091
Ending balance, value at Dec. 31, 2020 | $ 258,303 |  | $ 165,743 |  | $ 5 |  | $ 307,788 |  | $ (24,051) | $ (117,999) | $ 92,560
Ending balance (in shares) at Dec. 31, 2020 |  |  |  |  | 51,640,537 |  |  |  |  |  |

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