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BUSINESS COMBINATIONS AND RELATED ACTIVITY (Details - Narrative) |  |  |  |  | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 15, 2022 USD ($) location | Apr. 01, 2022 USD ($) | Mar. 31, 2022 USD ($) shares | Jan. 20, 2022 USD ($) $ / shares shares | Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Apr. 01, 2022 location | Apr. 01, 2022 center | Dec. 31, 2021 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 575,092,000 |  |  |  | $ 513,820,000
Property and equipment, net |  |  |  |  | 515,569,000 |  |  |  | 484,247,000
Frederick County Radiology, LLC |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Ownership interest |  | 65.00% |  |  |  |  |  |  |
Frederick County Radiology, LLC | Frederick Health Hospital, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  | $ 10,800,000 |  |  |  |  |  |  |
Number of location offering multi-modality services |  |  |  |  |  |  | 6 | 4 |
Property and equipment, net |  | 8,400,000 |  |  |  |  |  |  |
Retains |  | $ 11,100,000 |  |  |  |  |  |  |
Ownership interest |  | 35.00% |  |  |  |  |  |  |
Frederick County Radiology, LLC | Frederick Health Hospital, Inc. | Fixed Assets |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Property and equipment, net |  | $ 5,400,000 |  |  |  |  |  |  |
Frederick County Radiology, LLC | Frederick Health Hospital, Inc. | Equipment |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Property and equipment, net |  | $ 3,000,000 |  |  |  |  |  |  |
Advanced Radiology at Capital Region, LLC |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Number of location offering multi-modality services | location | 2 |  |  |  |  |  |  |  |
Ownership interest | 51.00% |  |  |  |  |  |  |  |
Payments to acquire additional interest in subsidiaries | $ 5,100 |  |  |  |  |  |  |  |
Advanced Radiology at Capital Region, LLC | Dimension Health Corporation |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Ownership interest | 49.00% |  |  |  |  |  |  |  |
Contributed assets | $ 4,900 |  |  |  |  |  |  |  |
Aidence B.V |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Purchase consideration |  |  |  | $ 45,200,000 |  |  |  |  |
Shares issued (in shares) | shares |  |  |  | 1,141,234 |  |  |  |  |
Cash payment to acquire business |  |  |  | $ 1,800,000 |  |  |  |  |
Assumed liabilities |  |  |  | 11,900,000 |  |  |  |  |
Loans settled |  |  |  | 1,500,000 |  |  |  |  |
Current assets |  |  |  | 1,000,000 |  |  |  |  |
Property, plant, and equipment |  |  |  | 200,000 |  |  |  |  |
Intangible assets |  |  |  | 27,700,000 |  |  |  |  |
Liabilities |  |  |  | 3,200,000 |  |  |  |  |
Goodwill |  |  |  | 19,000,000 |  |  |  |  |
Aidence B.V | Cash Holdback |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Milestone contingent consideration |  |  |  | $ 4,500,000 |  |  |  |  |
Aidence B.V | Other Sellers |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  | 1,117,872 |  |  |  |  |
Price per share (dollars per share) | $ / shares |  |  |  | $ 26.80 |  |  |  |  |
Equity issued or issuable |  |  |  | $ 30,000,000 |  |  |  |  |
Aidence B.V | Certain Seller |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  | 23,362 |  |  |  |  |
Equity issued or issuable |  |  |  | $ 600,000 |  |  |  |  |
Quantib B.V |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Purchase consideration |  |  |  | $ 42,300,000 |  |  |  |  |
Shares issued (in shares) | shares |  |  | 113,303 | 965,058 |  |  |  |  |
Price per share (dollars per share) | $ / shares |  |  |  | $ 26.80 |  |  |  |  |
Equity issued or issuable |  |  | $ 3,000,000 | $ 25,900,000 |  |  |  |  |
Cash payment to acquire business |  |  |  | 11,800,000 |  |  |  |  |
Milestone contingent consideration |  |  |  |  | $ 10,228,000 | $ 8,437,000 |  |  | $ 0
Current assets |  |  |  | 2,400,000 |  |  |  |  |
Property, plant, and equipment |  |  |  | 100,000 |  |  |  |  |
Intangible assets |  |  |  | 21,300,000 |  |  |  |  |
Liabilities |  |  |  | 3,700,000 |  |  |  |  |
Goodwill |  |  |  | $ 22,200,000 |  |  |  |  |
Contingent consideration, liability, period |  |  |  | 18 months | 18 months |  |  |  |
Quantib B.V | Cash Holdback |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Milestone contingent consideration |  |  |  |  | $ 1,600,000 |  |  |  |
Aidence Holding B.V. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Milestone contingent consideration |  |  |  | $ 7,400,000 | $ 7,900,000 |  |  |  |

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