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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands | Total | Total Radnet, Inc.'s Equity | Common Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2018 |  |  | 48,977,485 |  |  |  |
Beginning balance, value at Dec. 31, 2018 | $ 200,253 | $ 127,184 | $ 5 | $ 242,835 | $ 2,259 | $ (117,915) | $ 73,069
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock upon exercise of options (in shares) |  |  | 10,000 |  |  |  |
Issuance of common stock upon exercise of options | 50 | 50 |  | 50 |  |  |
Issuance of common stock under the equity compensation plan (in shares) |  |  | 701,042 |  |  |  |
Issuance of common stock under the equity compensation plan | 0 |  |  |  |  |  |
Stock-based compensation expense | 5,638 | 5,638 |  | 5,638 |  |  |
Issuance of common stock for acquisition (in shares) |  |  | 440,207 |  |  |  |
Issuance of common stock for acquisition | 6,000 | 6,000 |  | 6,000 |  |  |
Forfeiture of restricted stock (in shares) |  |  | (1,500) |  |  |  |
Forfeiture of restricted stock | (5) | (5) |  | (5) |  |  |
Sale of noncontrolling interests, net of taxes | 5,097 | 3,089 |  | 3,089 |  |  | 2,008
Purchase of noncontrolling interests | (1,818) |  |  |  |  |  | (1,818)
Contribution from noncontrolling partner | 750 |  |  |  |  |  | 750
Change in cumulative foreign currency translation adjustment | (5) | (5) |  |  | (5) |  |
Change in fair value cash flow hedge, net of taxes | (9,198) | (9,198) |  |  | (9,198) |  |
Amount of loss reclassified from accumulated OCI into income (prior period effective portion) | 0 |  |  |  |  |  |
Net (loss) income | 5,668 | 1,165 |  |  |  | 1,165 | 4,503
Ending balance (in shares) at Jun. 30, 2019 |  |  | 50,127,234 |  |  |  |
Ending balance, value at Jun. 30, 2019 | 212,430 | 133,918 | $ 5 | 257,607 | (6,944) | (116,750) | 78,512
Beginning balance (in shares) at Mar. 31, 2019 |  |  | 50,081,478 |  |  |  |
Beginning balance, value at Mar. 31, 2019 | 213,538 | 135,900 | $ 5 | 256,488 | 1,055 | (121,648) | 77,638
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock upon exercise of options (in shares) |  |  | 0 |  |  |  |
Issuance of common stock upon exercise of options | 0 |  |  |  |  |  |
Issuance of common stock under the equity compensation plan (in shares) |  |  | 47,256 |  |  |  |
Issuance of common stock under the equity compensation plan | 0 |  |  |  |  |  |
Stock-based compensation expense | 1,124 | 1,124 |  | 1,124 |  |  |
Forfeiture of restricted stock (in shares) |  |  | (1,500) |  |  |  |
Forfeiture of restricted stock | (5) | (5) |  | (5) |  |  |
Purchase of noncontrolling interests | (1,818) |  |  |  |  |  | (1,818)
Change in cumulative foreign currency translation adjustment | 3 | 3 |  |  | 3 |  |
Change in fair value cash flow hedge, net of taxes | (8,002) | (8,002) |  |  | (8,002) |  |
Amount of loss reclassified from accumulated OCI into income (prior period effective portion) | 0 |  |  |  |  |  |
Other | (1) | (1) |  |  |  | (1) |
Net (loss) income | 7,591 | 4,899 |  |  |  | 4,899 | 2,692
Ending balance (in shares) at Jun. 30, 2019 |  |  | 50,127,234 |  |  |  |
Ending balance, value at Jun. 30, 2019 | 212,430 | 133,918 | $ 5 | 257,607 | (6,944) | (116,750) | 78,512
Beginning balance (in shares) at Dec. 31, 2019 |  |  | 50,314,328 |  |  |  |
Beginning balance, value at Dec. 31, 2019 | 233,139 | 151,685 | $ 5 | 262,865 | (8,026) | (103,159) | 81,454
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock under the equity compensation plan (in shares) |  |  | 416,817 |  |  |  |
Issuance of common stock under the equity compensation plan | 0 |  |  |  |  |  |
Stock-based compensation expense | 8,136 | 8,136 |  | 8,136 |  |  |
Issuance of common stock for acquisition (in shares) |  |  | 823,615 |  |  |  |
Issuance of common stock for acquisition | 33,011 | 33,011 |  | 33,011 |  |  |
Change in cumulative foreign currency translation adjustment | (6) | (6) |  |  | (6) |  |
Change in fair value cash flow hedge, net of taxes | (18,958) | (18,958) |  |  | (18,958) |  |
Amount of loss reclassified from accumulated OCI into income (prior period effective portion) | 892 | 892 |  |  | 892 |  |
Net (loss) income | (22,958) | (26,952) |  |  |  | (26,952) | 3,994
Ending balance (in shares) at Jun. 30, 2020 |  |  | 51,554,760 |  |  |  |
Ending balance, value at Jun. 30, 2020 | 233,256 | 147,808 | $ 5 | 304,012 | (26,098) | (130,111) | 85,448
Beginning balance (in shares) at Mar. 31, 2020 |  |  | 50,694,375 |  |  |  |
Beginning balance, value at Mar. 31, 2020 | 207,189 | 123,375 | $ 5 | 269,461 | (26,574) | (119,517) | 83,814
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock under the equity compensation plan (in shares) |  |  | 36,770 |  |  |  |
Issuance of common stock under the equity compensation plan | 0 |  |  |  |  |  |
Stock-based compensation expense | 1,540 | 1,540 |  | 1,540 |  |  |
Issuance of common stock for acquisition (in shares) |  |  | 823,615 |  |  |  |
Issuance of common stock for acquisition | 33,011 | 33,011 |  | 33,011 |  |  |
Change in cumulative foreign currency translation adjustment | (7) | (7) |  |  | (7) |  |
Change in fair value cash flow hedge, net of taxes | (409) | (409) |  |  | (409) |  |
Amount of loss reclassified from accumulated OCI into income (prior period effective portion) | 892 | 892 |  |  | 892 |  |
Net (loss) income | (8,960) | (10,594) |  |  |  | (10,594) | 1,634
Ending balance (in shares) at Jun. 30, 2020 |  |  | 51,554,760 |  |  |  |
Ending balance, value at Jun. 30, 2020 | $ 233,256 | $ 147,808 | $ 5 | $ 304,012 | $ (26,098) | $ (130,111) | $ 85,448

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