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FACILITY ACQUISITIONS AND DISPOSITIONS (Details Narrative) |  |  |  |  | 9 Months Ended |
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Aug. 31, 2020 USD ($) Center | Jun. 01, 2020 USD ($) $ / shares shares | Mar. 02, 2020 USD ($) | Jan. 02, 2020 USD ($) | Sep. 30, 2020 USD ($) $ / shares | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) $ / shares
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  | $ 470,685,000 |  | $ 441,973,000
Common stock - par value (in dollars per share) | $ / shares |  |  |  |  | $ 0.0001 |  | $ 0.0001
Proceeds from the sale of equity interests in a joint venture |  |  |  |  | $ 0 | $ 132,000 |
Imaging On Call |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Proceeds from the sale of equity interests in a joint venture |  | $ 1,000.0 |  |  |  |  |
AZ Tech Radiology & Open MRI, LLC |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of businesses acquired | Center | 8 |  |  |  |  |  |
Purchase consideration | $ 5,500,000 |  |  |  |  |  |
Fixed assets acquired | 2,500,000 |  |  |  |  |  |
Right-of-use asset required | 7,600,000 |  |  |  |  |  |
Other assets acquired | 100,000 |  |  |  |  |  |
Operating lease liabilities acquired | 7,600,000 |  |  |  |  |  |
Goodwill acquired | $ 2,900,000 |  |  |  |  |  |
MRI at Woodbridge, LLC |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase consideration |  |  | $ 2,600,000 |  |  |  |
Fixed assets acquired |  |  | 500,000 |  |  |  |
Right-of-use asset required |  |  | 1,100,000 |  |  |  |
Operating lease liabilities acquired |  |  | 1,100,000 |  |  |  |
Goodwill acquired |  |  | 1,800,000 |  |  |  |
Intangible assets acquired |  |  | 300,000 |  |  |  |
Finance lease liabilities acquired |  |  | $ 100,000 |  |  |  |
Olney Open MRI, LLC |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase consideration |  |  |  | $ 1,800,000 |  |  |
Fixed assets acquired |  |  |  | 800,000 |  |  |
Right-of-use asset required |  |  |  | 1,300,000 |  |  |
Operating lease liabilities acquired |  |  |  | 1,300,000 |  |  |
Goodwill acquired |  |  |  | 600,000 |  |  |
Intangible assets acquired |  |  |  | $ 300,000 |  |  |
DeepHealth Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase consideration |  | 34,600,000 |  |  |  |  |
Goodwill acquired |  | $ 23,400,000 |  |  |  |  |
Shares issued (in shares) | shares |  | 915,132 |  |  |  |  |
Common stock - par value (in dollars per share) | $ / shares |  | $ 16.93 |  |  |  |  |
Shares issued at execution (in shares) | shares |  | 823,615 |  |  |  |  |
Shares issued after execution (in shares) | shares |  | 91,517 |  |  |  |  |
Shares issued after acquisition, term |  | 18 months |  |  |  |  |
Fair value of shares issued at execution |  | $ 13,900,000 |  |  |  |  |
Fair value of shares issued after execution |  | 1,500,000 |  |  |  |  |
Fair value of replacement awards attributable to pre-combination |  | 2,000,000.0 |  |  |  |  |
Contingent consideration, fair value |  | 17,000,000.0 |  |  |  |  |
Business acquisition, closing costs |  | $ 100,000 |  |  |  |  |
Contingent consideration, milestone one, shares issued (in shares) | shares |  | 390,789 |  |  |  |  |
Contingent consideration, milestone two, shares issued (in shares) | shares |  | 586,184 |  |  |  |  |
Contingent consideration, milestone three, shares issued (in shares) | shares |  | 195,393 |  |  |  |  |
Current assets acquired |  | $ 100,000 |  |  |  |  |
Deferred tax liabilities acquired |  | 3,500,000 |  |  |  |  |
Intangible assets acquired |  | $ 14,800,000 |  |  |  |  |

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