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Acquisitions of Businesses, 2019 Acquisition (Details) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 USD ($) Clinic Installment | Apr. 11, 2019 USD ($) State Location | Dec. 31, 2021 USD ($) Clinic | Dec. 31, 2020 USD ($) Clinic | Dec. 31, 2019 USD ($)
Business Combination, Description [Abstract] |  |  |  |  |
Number of clinics | Clinic |  |  | 5 | 3 |
Cash paid, net of cash acquired |  |  | $ 86,823 | $ 23,907 | $ 30,597
September 2019 Acquisition [Member] |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |
Percentage of interest acquired | 67.00% |  | 67.00% |  |
Number of clinics | Clinic | 11 |  | 11 |  |
Cash paid, net of cash acquired | $ 12,300 |  |  |  |
Aggregate purchase price for the acquisition | 12,400 |  |  |  |
Cash acquired | 200 |  |  |  |
Cash paid for acquisition | 12,600 |  |  |  |
Seller notes | $ 300 |  |  |  |
Number of installments | Installment | 2 |  |  |  |
Percentage of interest accrued | 5.00% |  |  |  |
September 2019 Acquisition [Member] | September 2020 [Member] |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |
Cash paid for acquisition | $ 150 |  |  |  |
September 2019 Acquisition [Member] | September 2021 [Member] |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |
Cash paid for acquisition | $ 150 |  |  |  |
April 2019 Acquisition [Member] |  |  |  |  |
Business Combination, Description [Abstract] |  |  |  |  |
Number of states of network services | State |  | 45 |  |  |
Number of onsite client locations | Location |  | 11 |  |  |
Percentage of interest acquired |  | 76.00% |  |  |
Cash paid, net of cash acquired |  | $ 18,900 |  |  |
Aggregate purchase price for the acquisition |  | 23,600 |  |  |
Cash acquired |  | 700 |  |  |
Cash paid for acquisition |  | 22,900 |  |  |
Payable to shareholders of seller |  | 500 |  |  |
Seller notes |  | $ 4,000 |  |  |
Percentage of interest accrued |  | 5.50% |  |  |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
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