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SIGNIFICANT ACCOUNTING POLICIES
9 Months Ended
Sep. 30, 2024
Accounting Policies [Abstract]  
SIGNIFICANT ACCOUNTING POLICIES SIGNIFICANT ACCOUNTING POLICIES
There have been no material changes to the significant accounting policies we use and have explained in our annual report on Form 10-K for the fiscal year ended December 31, 2023. The information below is intended only to supplement the disclosure in our annual report on Form 10-K for the fiscal year ended December 31, 2023.
REVENUES - Our revenues generally relate to net patient fees received from various payors and patients themselves under contracts in which our performance obligations are to provide diagnostic services to the patients. Revenues are recorded during the period when our obligations to provide diagnostic services are satisfied. Our performance obligations for diagnostic services are generally satisfied over a period of less than one day. The contractual relationships with patients, in most cases, also involve a third-party payor (Medicare, Medicaid, managed care health plans and commercial insurance companies, including plans offered through the health insurance exchanges) and the fees for the services provided are dependent upon the terms provided by Medicare and Medicaid, or negotiated with managed care health plans and commercial insurance companies. The payment arrangements with third-party payors for the services we provide to the related patients typically specify payments at amounts less than our standard charges and generally provide for payments based upon predetermined rates per diagnostic services or discounted fee-for-service rates. Management continually reviews the contractual estimation process to consider and incorporate updates to laws and regulations and the frequent changes in managed care contractual terms resulting from contract renegotiations and renewals.
As it relates to the Consolidated Medical Group, this service fee revenue includes payments for both the professional medical interpretation revenue recognized by the Consolidated Medical Group as well as the payment for all other aspects related to our providing the imaging services, for which we earn management fees. As it relates to others centers, this service fee revenue is earned through providing the use of our diagnostic imaging equipment and the provision of technical services as well as providing administration services such as clerical and administrative personnel, bookkeeping and accounting services, billing and collection, provision of medical and office supplies, secretarial, reception and transcription services, maintenance of medical records, and advertising, marketing and promotional activities.
Our revenues are based upon the estimated amounts we expect to be entitled to receive from patients and third-party payors. Estimates of contractual allowances under managed care and commercial insurance plans are based upon the payment terms specified in the related contractual agreements. Revenues related to uninsured patients and copayment and deductible amounts for patients who have health care coverage may have discounts applied (uninsured discounts and contractual
discounts). We also record estimated implicit price concessions (based primarily on historical collection experience) related to uninsured accounts to record self-pay revenues at the estimated amounts we expect to collect.
Under capitation arrangements with various health plans, we earn a per-enrollee amount each month for making available diagnostic imaging services to all plan enrollees under the capitation arrangement. Revenue under capitation arrangements is recognized in the period in which we are obligated to provide services to plan enrollees under contracts with various health plans.
Our total service revenues during the three and nine months ended September 30, 2024 and 2023 are presented in the table below based on an allocation of the estimated transaction price with the patient between the primary patient classification of insurance coverage (in thousands):
 Three Months Ended
September 30,
Nine Months Ended
September 30,
2024202320242023
Commercial insurance$255,375 $218,923 $752,514 $652,597 
Medicare102,852 89,981 298,001 262,719 
Medicaid10,894 10,519 32,804 30,279 
Workers' compensation/personal injury10,232 9,745 33,088 34,785 
Other patient revenue10,607 10,443 34,524 30,191 
Management fee revenue6,242 3,922 18,255 12,203 
Heart and lung4,696 2,441 12,553 6,377 
Other10,314 3,768 18,918 14,248 
Revenue under capitation arrangements33,563 40,041 105,050 117,982 
Imaging Center Segment Revenue444,775 389,783 1,305,707 1,161,381 
Digital Health Segment Revenue
16,367 12,185 46,856 34,866 
Total service revenue$461,142 $401,968 $1,352,563 $1,196,247 

ACCOUNTS RECEIVABLE - Substantially all of our accounts receivable are due under fee-for-service contracts from third party payors, such as insurance companies and government-sponsored healthcare programs, or directly from patients. Services are generally provided pursuant to one-year contracts with healthcare providers. We continuously monitor collections from our payors and maintain an allowance for bad debts based upon specific payor collection issues that we have identified and our historical experience.

We have entered into factoring agreements with various institutions and sold certain accounts receivable under non-recourse agreements in exchange for notes receivables from the buyers. These transactions are accounted for as a reduction in accounts receivable as the agreements transfer effective control over and risk related to the receivables to the buyers. Proceeds on notes receivables are reflected as operating activities on our statement of cash flows and on our balance sheet as prepaid expenses and other current assets for the current portion and deposits and other for the long term portion. Amounts remaining to be collected on these agreements were $5.9 million and $14.3 million at September 30, 2024 and December 31, 2023, respectively. We do not utilize factoring arrangements as an integral part of our financing for working capital and assess the party's ability to pay upfront at the inception of the notes receivable and subsequently by reviewing their financial statements annually and reassessing any insolvency risk on a periodic basis.
DEFERRED FINANCING COSTS - Costs of financing are deferred and amortized using the effective interest rate method and are related to our revolving credit facilities. Deferred financing costs, net of accumulated amortization, were $2.4 million and $1.6 million, as of September 30, 2024 and December 31, 2023, respectively. See Note 6, Credit Facilities and Notes Payable for more information.
PROPERTY AND EQUIPMENT - Property and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation of property and equipment is performed using the straight-line method over the estimated useful lives of the assets acquired, which range from 3 to 15 years. Leasehold improvements are amortized at the lesser of lease term or their estimated useful lives, which range from 3 to 15 years. Maintenance and repairs are charged to expense as incurred.
BUSINESS COMBINATIONS - When the qualifications for business combination accounting treatment are met, it requires us to recognize, separately from goodwill, the assets acquired and the liabilities assumed at their acquisition date fair values. Goodwill as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition
date fair values of the assets acquired and the liabilities assumed. While we use our best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date, our estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, we record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our consolidated statements of operations.
GOODWILL - Goodwill at September 30, 2024 totaled $711.8 million. Goodwill is recorded as a result of business combinations. If we determine the carrying value of a reporting unit exceeds its fair value an impairment charge would be recognized and should not exceed the total amount of goodwill allocated to that reporting unit. We tested goodwill and indefinite lived intangibles for impairment on October 1, 2023 noting no impairment, and we have not identified any indicators of impairment through September 30, 2024.
Activity in goodwill for the nine months ended September 30, 2024 is provided below (in thousands):
Imaging Center segment
Digital Health segment
Total
Balance as of December 31, 2023606,557 $72,906 $679,463 
Goodwill from acquisitions30,729 — 30,729 
Currency translation1,223 426 1,649 
Segment reorganization(12,300)12,300 — 
Balance as of September 30, 2024$626,209 $85,632 $711,841 
INTANGIBLE ASSETS - Intangible assets are primarily related to our business combinations and software development. They include the estimated fair values of such items as service agreements, customer lists, covenants not to compete, acquired technologies, and trade names. The components of intangible assets, both finite and indefinite lived, along with annual amortization expense that will be recorded over the next five years at September 30, 2024 and December 31, 2023 are as follows (in thousands):
As of September 30, 2024:

2024*2025202620272028ThereafterTotalWeighted average amortization period remaining in years
Management service contracts$572 $2,287 $2,287 $2,287 $2,287 $6,669 $16,389 7.2
Covenant not to compete and other contracts261 897 610 315 225 68 2,376 3.1
Customer lists318 1,141 1,019 844 803 11,108 15,233 17.4
Patent and trademarks 78 311 311 311 311 197 1,519 5.2
Developed technology1,913 7,651 7,611 7,077 7,077 6,856 38,185 5.8
Trade names amortized19 77 77 77 63 27 340 4.5
Trade names indefinite life — — — — — 8,500 8,500 — 
IPR&D— — — — — 1,899 1,899 — 
Total annual amortization$3,161 $12,364 $11,915 $10,911 $10,766 $35,324 $84,441 
*Excluding the nine months ended September 30, 2024
As of December 31, 2023:
20242025202620272028ThereafterTotalWeighted average amortization period remaining in years
Management service contracts$2,287 $2,287 $2,287 $2,287 $2,287 $6,671 $18,106 7.9
Covenant not to compete and other contracts946 714 427 132 45 2,270 3.4
Customer lists1,234 1,104 981 797 764 10,564 15,444 17.7
Patent and trademarks316 316 316 315 300 164 1,727 5.8
Developed technology7,785 7,785 7,745 7,210 7,046 6,117 43,688 5.7
Trade names amortized77 77 77 77 63 27 398 5.3
Trade names indefinite life— — — — — 7,100 7,100 — 
IPR&D— — — — — 1,882 1,882 — 
Total annual amortization$12,645 $12,283 $11,833 $10,818 $10,505 $32,531 $90,615 
Total intangible asset amortization expense was $3.1 million and $9.4 million for the three and nine months ended September 30, 2024, respectively. Total amortization expense was $3.0 million and $8.9 million for the three and nine months ended September 30, 2023, respectively. Intangible assets are amortized using the straight-line method over their useful life determined at acquisition. Management service contracts are amortized over 25 years using the straight line method. Developed technology is capitalized and amortized over the useful life of the software when placed into service. In process research and development (" IPR&D") and Trade names are reviewed annually for impairment.
INCOME TAXES - Income tax expense is computed using an asset and liability method and using expected annual effective tax rates. Under this method, deferred income tax assets and liabilities result from temporary differences in the financial reporting bases and the income tax reporting bases of assets and liabilities. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefit that, based on available evidence, is not expected to be realized. When it appears more likely than not that deferred taxes will not be realized, a valuation allowance is recorded to reduce the deferred tax asset to its estimated realizable value. For net deferred tax assets we consider estimates of future taxable income in determining whether our net deferred tax assets are more likely than not to be realized.
In 2021, the Organization for Economic Co-operation and Development ("OECD") announced an inclusive framework on base erosion and profit shifting including Pillar Two Model Rules defining the global minimum tax, which calls for taxation of large multinational corporations at a minimum rate of 15%. Subsequently, multiple sets of administrative guidance have been issued. Many non-US tax jurisdictions have either recently enacted legislation to support certain components of Pillar Two Model Rules beginning 2024 (including the European Union Member States) with the adoption of additional components in later years or announced their plans to enact legislation in future years. The model rules provide a framework for applying the minimum tax, countries may enact Pillar Two Model Rules slightly differently than the model rules and on different timelines and may adjust domestic tax incentives in response to Pillar Two Model Rules. On a long-term basis, we will continue to evaluate the impacts of enacted legislation and pending legislation to enact Pillar Two Model Rules in all countries applicable to us. For 2024, we expect that we will meet one or more transactional safe harbor rules, and as such, we do not believe Pillar Two model will have an impact on our annual effective tax rate for the year ending December 31, 2024.
We recorded an income tax expense of $4.3 million, or an effective tax rate of 26.1%, for the three months ended September 30, 2024 and $7.2 million, or an effective tax rate of 23.1% for the three months ended September 30, 2023. We recorded income tax expense of $4.9 million, or an effective tax rate of 16.7%, for the nine months ended September 30, 2024 and $7.7 million, or an effective tax rate of 24.1% for the nine months ended September 30, 2023. The income tax rates for the three and nine months ended September 30, 2024 diverge from the federal statutory rate due to (i) effects of state income taxes ; (ii) officer's compensation limitations; (iii) partial valuation allowance on losses in foreign jurisdictions, partially offset by (iv) excess tax benefits attributable to share based compensation; and (v) noncontrolling interests from controlled partnerships.
LEASES - We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current operating lease liabilities, and long term operating lease liability in our condensed consolidated balance sheets. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. We use the implicit rate when readily determinable. We include options to extend a lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. For a contract in which we are a lessee that contains fixed payments for both lease and non-lease components, we have
elected to account for the components as a single lease component. ROU assets are tested for impairment if circumstances suggest that the carrying amount may not be recoverable. Our ROU assets consist of facility and equipment assets on operating leases. No events have occurred such as fire, flood, or other acts which have impaired the integrity of our ROU assets as of September 30, 2024. Our facility leases require us to maintain insurance policies which would cover major damage to our facilities. We maintain business interruption insurance to cover loss of business due to a facility becoming non-operational under certain circumstances. Our equipment leases are covered by warranty and service contracts which cover repairs and provide regular maintenance to keep the equipment in functioning order.
EQUITY BASED COMPENSATION – We have one long-term incentive plan that we adopted in 2006 and which we have amended and restated at various points in time: April 20, 2015, March 9, 2017, April 15, 2021 April 27, 2023, and most recently by our stockholders at our annual stockholders meeting on June 7, 2023 (the “Restated Plan”). We have reserved 20,100,000 shares of common stock for issuance under the Restated Plan which can be issued in the form of incentive and/or nonstatutory stock options, restricted and/or unrestricted stock, stock units, and stock appreciation rights. Terms and conditions of awards can be direct grants or based on achieving a performance metric. We also consider probability of achievement of performance conditions when determining expense recognition. For the awards where vesting is probable, equity-based compensation is recognized over the related vesting period. Stock options generally vest over three years to five years and expire five years to ten years from date of grant. We determine the compensation expense for each stock option award using the Black Scholes model. This model requires that our management make certain estimates concerning risk free interest rates and volatility in the trading price of our common stock. The compensation expense recognized for all equity-based awards is recognized over the awards’ service periods. Equity-based compensation is classified in operating expenses within the same line item as the majority of the cash compensation paid to employees. In connection with our acquisition of DeepHealth Inc. on June 1, 2020, we assumed the DeepHealth, Inc. 2017 Equity Incentive Plan, including outstanding options awards that can be exercised for our common stock. No additional awards will be granted under the DeepHealth, Inc. 2017 Equity Incentive Plan. See Note 7, Stock-Based Compensation, for more information.
COMPREHENSIVE INCOME (LOSS) - Accounting guidance establishes rules for reporting and displaying other comprehensive income (loss) and its components. Our foreign currency translation adjustments and the amortization of balances associated with derivatives previously classified as cash flow hedges are included in other comprehensive income (loss). The components of other comprehensive income (loss) for the three and nine months ended September 30, 2024 and September 30, 2023 are included in the consolidated statements of comprehensive income.
INTEREST INCOME - We recognized interest income of approximately $9.6 million and $3.6 million for the three months ended September 30, 2024 and 2023, respectively, and $22.7 million and $6.3 million for the nine months ended September 30, 2024 and 2023, respectively. Interest income is recorded within Other non-operating income in our Condensed Consolidated Statements of Operations.
COMMITMENTS AND CONTINGENCIES - We are party to various legal proceedings, claims, and regulatory, tax or government inquiries and investigations that arise in the ordinary course of business. With respect to these matters, we evaluate the developments on a regular basis and accrue a liability when we believe a loss is probable and the amount can be reasonably estimated. Based on current information, we do not believe that reasonably possible or probable losses associated with pending legal proceedings would either individually or in the aggregate, have a material adverse effect on our business and consolidated financial statements. However, the outcome of these matters is inherently uncertain. If one or more of these matters were resolved against us for amounts in excess of management's expectations, our results of operations and financial condition, including in a particular reporting period in which any such outcome becomes probable and estimable, could be materially adversely affected.
DERIVATIVE INSTRUMENTS - In the second quarter of 2019, we entered into four forward interest rate agreements ("2019 Swaps"). The 2019 Swaps have total notional amounts of $500.0 million, consisting of two agreements of $50.0 million each and two agreements of $200.0 million each. The 2019 Swaps secure a constant interest rate associated with portions of our variable rate bank debt and have an effective date of October 13, 2020. They matured in October 2023 for the smaller notional and will mature in October 2025 for the larger notional. We arranged the 2019 Swaps with locked in 1 month Term SOFR rates at 1.89% for the $100.0 million notional and at 1.98% for the $400.0 million notional. As of the effective date, we are liable for premium payments if interest rates decline below arranged rates, but will receive interest payments if rates are above the arranged rates.
At inception, we designated our 2019 Swaps as cash flow hedges of floating-rate borrowings. In accordance with accounting guidance, derivatives that have been designated and qualify as cash flow hedging instruments are reported at fair value. The gain or loss on the effective portion of the hedge (i.e. change in fair value) is reported as a component of comprehensive gain or loss in the consolidated statement of equity. The remaining gain or loss, if any, is recognized currently in earnings. The cash flows for both our $400.0 million notional interest rate swap contract locked in at 1.98% due October 2025 and our $100.0 million notional interest rate swap contract locked in at 1.89% did not match the cash flows for our term
loans under our Barclays Credit Facility, so we determined that they are not effective as cash flow hedges. Accordingly, all changes in their fair value after April 1, 2020 for the $400.0 million notional and after July 1, 2020 for the $100.0 million notional are being recognized in earnings. As of July 1, 2020, the total change in fair value relating to swaps included in other comprehensive income was approximately $24.4 million, net of taxes. This amount was amortized to interest expense through October 2023 at approximately $0.4 million per month and continuing at approximately $0.3 million per month through October 2025. The effect for the release of the taxes from other comprehensive income is based on the current tax rate.
A tabular presentation of the effect of derivative instruments on our consolidated statement of comprehensive income of the 2019 Swaps which remain ineffective is as follows (amounts in thousands):

For the three months ended September 30, 2024
AccountJune 30, 2024 BalanceAmount of comprehensive loss recognized on derivative net of taxesAmount of loss reclassified out of accumulated OCI into income (prior period effective portion), net of taxes*September 30, 2024 Balance Location
Accumulated Other Comprehensive Loss, net of taxes$(4,369)$—$986$(3,383)Equity
*Net of taxes of $0.4 million for the three months ended September 30, 2024.
For the nine months ended September 30, 2024
AccountDecember 31, 2023 BalanceAmount of comprehensive loss recognized on derivative net of taxesAmount of loss reclassified out of accumulated OCI into income (prior period effective portion), net of taxes*September 30, 2024 BalanceLocation
Accumulated Other Comprehensive Loss, net of taxes$(11,625)$—$8,242$(3,383)Equity
*Net of taxes of $2.8 million for the nine months ended September 30, 2024.
A tabular presentation of the effect of derivative instruments on our statement of operations of the 2019 Swaps which remain ineffective is as follows (amounts in thousands):

For the three months ended September 30, 2024
Ineffective interest rate swapAmount recognized (current period ineffective portion)Location recognized in profit and loss (current period ineffective portion)Amount reclassified from accumulated OCI (prior period effective portion)Location reclassified from accumulated OCI into profit and loss (prior period effective portion)
Interest rate contracts$6,755 Other income (expense)$986 Interest Expense
For the nine months ended September 30, 2024
Ineffective interest rate swapAmount recognized (current period ineffective portion)Location recognized in profit and loss (current period ineffective portion)Amount reclassified from accumulated OCI (prior period effective portion)Location reclassified from accumulated OCI into profit and loss (prior period effective portion)
Interest rate contracts$7,429 Other income (expense)$8,242 Interest Expense

See Fair Value Measurements below for the fair value of the 2019 Swaps at September 30, 2024.
CONTINGENT CONSIDERATION -
The HLH Imaging Group Limited fka Heart and Lung Imaging Limited
On November 1, 2022, we completed our acquisition of 75% of the equity interests of Heart and Lung Imaging Limited. The purchase included up to $10.2 million in contingent milestone consideration and cash holdback of $0.6 million to be issued 24 months after acquisition subject to adjustment for any indemnification claims, which will be adjusted to fair value in subsequent periods. The holdback had a value of approximately $0.6 million as of September 30, 2024. The contingent consideration is determined by the achievement of a specific number of physician reads. On September 20, 2023, we settled a milestone contingent liability by issuing 56,600 shares of our common stock at an ascribed value of $1.6 million and cash of $1.8 million. On December 12, 2023, we settled a milestone contingent liability by issuing 64,569 shares of our common stock at an ascribed value of $2.3 million and cash of $2.1 million. On March 27, 2024, we partially settled a milestone contingent liability by issuing 95,019 shares of our common stock at an ascribed value of $4.6 million. On April 1, 2024, we settled the remaining milestone contingent liability in cash of $3.6 million.
A tabular roll forward of contingent consideration is as follows (amounts in thousands):
For the three months ended September 30, 2024
EntityAccountJune 30, 2024 BalanceSettlement of contingent considerationChange in valuation of contingent considerationCurrency translationSeptember 30, 2024 Balance
Heart and LungAccrued expenses632 $— $— $— $632 
For the three months ended September 30, 2023
EntityAccountJune 30, 2023 BalanceSettlement of contingent considerationChange in valuation of contingent considerationCurrency translationSeptember 30, 2023 Balance
Heart and LungAccrued Expenses & Other Long Term Liabilities14,358 $(3,402)$915 $(772)$11,099 
For the nine months ended September 30, 2024
EntityAccountJanuary 1, 2024 BalanceSettlement of contingent considerationChange in valuation of contingent considerationCurrency translationSeptember 30, 2024 Balance
Heart and LungAccrued expenses6,879 $(8,221)$1,060 $914 $632 
For the nine months ended September 30, 2023
EntityAccountJanuary 1, 2023 BalanceSettlement of contingent considerationChange in valuation of contingent considerationCurrency translationSeptember 30, 2023 Balance
Heart and LungAccrued Expenses & Other Long Term Liabilities11,656 $(3,402)$2,906 $(61)$11,099 
Gain or loss from change in valuation of contingent consideration are recorded within Cost of operations in our Consolidated Statements of Operations.
See Fair Value Measurements below for the fair value of contingent consideration at September 30, 2024.
FAIR VALUE MEASUREMENTS – Assets and liabilities subject to fair value measurements are required to be disclosed within a fair value hierarchy. The fair value hierarchy ranks the quality and reliability of inputs used to determine fair value. Accordingly, assets and liabilities carried at, or permitted to be carried at, fair value are classified within the fair value hierarchy in one of the following categories based on the lowest level input that is significant to a fair value measurement:
Level 1—Fair value is determined by using unadjusted quoted prices that are available in active markets for identical assets and liabilities.
Level 2—Fair value is determined by using inputs other than Level 1 quoted prices that are directly or indirectly observable. Inputs can include quoted prices for similar assets and liabilities in active markets or quoted prices for identical assets and liabilities in inactive markets. Related inputs can also include those used in valuation or other pricing models such as interest rates and yield curves that can be corroborated by observable market data.
Level 3—Fair value is determined by using inputs that are unobservable and not corroborated by market data. Use of these inputs involves significant and subjective judgment.
Derivatives:
The tables below summarize the estimated fair values of certain of our financial assets that are subject to fair value measurements, and the classification of these assets on our condensed consolidated balance sheets, as follows (in thousands):
 As of September 30, 2024
Level 1Level 2Level 3Total
Long term assets    
2019 Swaps - Interest Rate Contracts$— $7,689 $— $7,689 
 As of December 31, 2023
Level 1Level 2Level 3Total
Current and long term assets    
2019 Swaps - Interest Rate Contracts$— $15,118 $— $15,118 
The estimated fair value of these contracts was determined using Level 2 inputs. More specifically, the fair value was determined by calculating the value of the difference between the fixed interest rate of the interest rate swaps and the counterparty’s forward SOFR curve. The forward SOFR curve is readily available in the public markets or can be derived from information available in the public markets.
Contingent Consideration:
The table below summarizes the estimated fair values of holdback relating to our Heart and Lung Imaging Limited acquisition on November 1, 2022 that are subject to fair value measurements and the classification of these liabilities on our condensed consolidated balance sheets, as follows (in thousands):
 As of September 30, 2024
Level 1Level 2Level 3Total
Accrued expenses    
Heart & Lung Imaging Limited$— $— $632 $632 
 As of December 31, 2023
Level 1Level 2Level 3Total
Accrued expenses    
Heart & Lung Imaging Limited$— $— $6,879 $6,879 

The estimated fair value of these liabilities was determined using Level 3 inputs. For Heart & Lung Imaging Limited the contingent consideration is determined by the achievement of a specific number of physician reads. The fair value is measured based upon the probability adjusted amount expected to be paid. As significant inputs for the contingent consideration of Heart & Lung Imaging Limited are not observable and cannot be corroborated by observable market data they are classified as Level 3.
Long Term Debt:
The table below summarizes the estimated fair value compared to the face value of our long-term debt as follows (in thousands):
 As of September 30, 2024
Level 1Level 2Level 3Total Fair ValueTotal Face Value
Barclays Term Loan and Truist Term Loan$— $1,010,778 $— $1,010,778 $1,009,687 
 As of December 31, 2023
Level 1Level 2Level 3Total Fair ValueTotal Face Value
Barclays Term Loan and Truist Term Loan$— $824,759 $— $824,759 $823,063 


The estimated fair value of our long-term debt, which is discussed in Note 6, Credit Facilities and Notes Payable, was determined using Level 2 inputs primarily related to comparable market prices.
We consider the carrying amounts of cash and cash equivalents, receivables, other current assets, current liabilities and other notes payables to approximate their fair value because of the relatively short period of time between the origination of these instruments and their expected realization or payment.
EARNINGS PER SHARE - Earnings per share is based upon the weighted average number of shares of common stock and common stock equivalents outstanding, net of common stock held in treasury, as follows (in thousands except share and per share data):
 Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS$3,209 $17,540 $(2,552)$4,904 
BASIC NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period73,494,709 67,793,404 72,587,321 62,113,707 
Basic net income (loss) per share attributable to RadNet, Inc.'s common stockholders
$0.04 $0.26 $(0.04)$0.08 
DILUTED NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS
Weighted average number of common shares outstanding during the period73,494,709 67,793,404 72,587,321 62,113,707 
Add non-vested restricted stock subject only to service vesting233,235 217,238 — 202,082 
Add additional shares issuable upon exercise of stock options and contingently issuable shares1,437,491 799,176 — 905,462 
Weighted average number of common shares used in calculating diluted net income per share75,165,435 68,809,818 72,587,321 63,221,251 
Diluted net income (loss) income per share attributable to RadNet, Inc.'s common stockholders
$0.04 $0.25 $(0.04)$0.08 
Stock options and non-vested restricted awards excluded from the computation of diluted per share amounts as their effect would be antidilutive:
Non-vested restricted stock subject to service vesting— — 680,318 — 
Shares issuable upon the exercise of stock options— 88,600 820,932 761,708 
Shares issuable subject to satisfaction of certain contingencies— — — 193,207 
Weighted average shares for which the exercise price exceeds average market price of common stock— — — 94,346 

INVESTMENTS IN EQUITY SECURITIES–Accounting guidance requires entities to measure equity investments at fair value, with any changes in fair value recognized in net income. If there is no readily determinable fair value, the guidance allows entities the ability to measure investments at cost, adjusted for observable price changes and impairments, with changes recognized in net income.
As of September 30, 2024, we have four equity investments with an aggregate carrying value of $8.0 million.
During the three months ended September 30, 2024, we recognized a $1.2 million impairment loss on our investment in Israel-based Medic Vision. This was driven by the escalating geopolitical tensions in Israel, which adversely affected market conditions, along with a bona fide offer we received for a similar investment. The offer, which was below the carrying value of our investment, provided a reliable indication of the current fair value of our Medic Vision investment. As a result, we
determined that the carrying amount of the investment exceeded its fair value, and the impairment loss has been recorded within "Other income" in our Condensed Consolidated Statements of Operations.
No other observable price changes or impairments in our investments were identified as of September 30, 2024.
INVESTMENT IN JOINT VENTURES – We have 13 unconsolidated joint ventures with ownership interests ranging from 33% to 55%. These joint ventures represent partnerships with hospitals, health systems or radiology practices and were formed for the purpose of owning and operating diagnostic imaging centers. Professional services at the joint venture diagnostic imaging centers are performed by contracted radiology practices or a radiology practice that participates in the joint venture. Our investment in these joint ventures is accounted for under the equity method, since RadNet does not have a controlling interest in such ventures. We evaluate our investment in joint ventures, including cost in excess of book value (equity method goodwill) for impairment whenever indicators of impairment exist. No indicators of impairment existed as of September 30, 2024.
Joint venture investment and financial information
The following table is a summary of our investment in joint ventures during the nine months ended September 30, 2024 (in thousands):
Balance as of December 31, 2023$92,710 
Equity in earnings in these joint ventures11,308 
Distribution of earnings(1,000)
Equity contributions in existing joint ventures1,496 
Balance as of September 30, 2024$104,514 
We charged management service fees from the centers underlying these joint ventures of approximately $5.9 million and $3.9 million for the three months ended September 30, 2024 and 2023 and $17.8 million and $12.2 million for the nine months ended September 30, 2024 and 2023, respectively. We eliminate any unrealized portion of our management service fees with our equity in earnings of joint ventures. As we have the ability to exercise significant influence over our joint venture entities, we consider them related parties. Amounts transacted between ourselves and the entities are in the ordinary course of business and are disclosed on our balance sheet in the due from/to affiliate accounts.
The following table is a summary of key balance sheet data for these joint ventures as of September 30, 2024 and December 31, 2023 and income statement data for the nine months ended September 30, 2024 and 2023 (in thousands):
Balance Sheet Data:September 30, 2024December 31, 2023
Current assets$64,175 $39,819 
Noncurrent assets219,478 224,936 
Current liabilities(41,550)(46,587)
Noncurrent liabilities(70,607)(70,834)
Total net assets$171,496 $147,334 
Income statement data for the nine months ended September 30,
20242023
Net revenue$195,905 $129,020 
Net income$23,949 $7,906