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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
Organization
 
In May 2020, Assertio Therapeutics, Inc. implemented a holding company reorganization through which Assertio Therapeutics, Inc. became a subsidiary of Assertio Holdings, Inc. (Assertio Reorganization) and, subsequently, Assertio Holdings, Inc. merged with Zyla Life Sciences (Zyla) in a transaction we refer to as the “Zyla Merger.” Unless otherwise noted or required by context, use of “Assertio,” “Company,” “we,” “our” and “us” refer to Assertio Holdings, Inc. and/or its applicable subsidiary or subsidiaries.

Assertio is a specialty pharmaceutical company that sells commercial products to wholesale distributors and specialty pharmacies in the United States (“U.S.”). The Company’s primary marketed products include:

INDOCIN® (indomethacin) Suppositories
A suppository form and oral solution of indomethacin used in the hospital as well as in the out-patient setting. Both products are nonsteroidal anti-inflammatory drug (NSAID), approved for:
• Moderate to severe rheumatoid arthritis including acute flares of chronic disease
• Moderate to severe ankylosing spondylitis
INDOCIN® (indomethacin) Oral Suspension
• Moderate to severe osteoarthritis
• Acute painful shoulder (bursitis and/or tendinitis)
• Acute gouty arthritis
CAMBIA® (diclofenac potassium for oral solution)
A prescription NSAID indicated for the acute treatment of migraine attacks with or without aura in adults 18 years of age or older. CAMBIA can help patients with migraine pain, nausea, photophobia (sensitivity to light), and phonophobia (sensitivity to sound). CAMBIA is not a pill, it is a powder, and combining CAMBIA with water activates the medicine in a unique way.
Otrexup® (methotrexate)
injection for subcutaneous use
A once weekly single-dose auto-injector containing a prescription medicine, methotrexate. Methotrexate is used to:
• Treat certain adults with severe, active rheumatoid arthritis, and children with active polyarticular juvenile idiopathic arthritis (pJIA), after treatment with other medicines including non-steroidal anti-inflammatory drugs (NSAIDS) have been used and did not work well.
• Control the symptoms of severe, resistant, disabling psoriasis in adults when other types of treatment have been used and did not work well.
SPRIX® (ketorolac tromethamine) Nasal Spray
A prescription NSAID indicated in adult patients for the short term (up to five days) management of moderate to moderately severe pain that requires analgesia at the opioid level. SPRIX is a non-narcotic nasal spray provides patients with moderate to moderately severe short-term pain a form of ketorolac that is absorbed rapidly but does not require an injection administered by a healthcare provider (HCP).
Zipsor® (diclofenac potassium) Liquid filled capsules
A prescription NSAID used for relief of mild-to-moderate pain in adults (18 years of age and older). Zipsor uses proprietary ProSorb® delivery technology to deliver a finely dispersed, rapid and consistently absorbed formulation of diclofenac.

Other commercially available products include OXAYDO® (oxycodone HCI, USP) tablets for oral use only —CII.

On December 15, 2021, the Company, through a newly-formed subsidiary, Otter Pharmaceuticals, LLC, entered into an Asset Purchase Agreement (the “Purchase Agreement”) with Antares Pharma, Inc. (“Antares”), and concurrently consummated the transaction. Pursuant to the terms of the Purchase Agreement, the Company acquired Antares’ rights, title and interest in and to Otrexup, including certain related assets, intellectual property, contracts, and product inventory for (i) $18.0 million in cash paid at closing, (ii) $16.0 million in cash payable on May 31, 2022 and (iii) and $10.0 million in cash payable on December 15, 2022.

On February 9, 2021, the Company completed a registered direct offering with certain institutional investors and accredited investors to sell 5,650,000 shares of our common stock at a purchase price of $2.48 per share on a post stock split basis. The gross proceeds from the offering were approximately $14.0 million. After placement agent fees and other offering expenses payable by the Company, Assertio received net proceeds of approximately $13.1 million. On February 12, 2021, the
Company completed a registered direct offering with certain institutional investors and accredited investors to sell 8,750,000 shares of our common stock at a purchase price of $3.92 per share on a post stock split basis. The gross proceeds from the offering were approximately $34.3 million. After placement agent fees and other offering expenses payable by the Company, Assertio received net proceeds of approximately $32.2 million. The Company intends to use proceeds from both offerings for general corporate purposes, including general working capital.

In September 2020, the Company terminated its Second Amended and Restated Nano-Reformulated Compound License Agreement as of January 27, 2020 (the “iCeutica License”), with iCeutica Inc. and iCeutica Pty Ltd. (collectively, “iCeutica”). The iCeutica License allowed the Company to utilize certain technology and intellectual property related to iCeutica’s SOLUMATRIX technology and certain other rights of iCeutica. Effective the termination of the iCeutica License, the Company ceased manufacturing products using SOLUMATRIX technology and will sell through its remaining inventory.

On February 13, 2020, the Company completed the sale of its remaining rights, title and interest in and to the NUCYNTA® franchise to Collegium Pharmaceutical, Inc. (Collegium) for $375.0 million, less royalties, in cash at closing.
Collegium assumed certain contracts, liabilities and obligations relating to the NUCYNTA products, including those related to manufacturing and supply, post-market commitments and clinical development costs. Collegium also paid for certain inventories relating to the products.

On January 10, 2020, the Company completed the sale of Gralise® (gabapentin) to Golf Acquiror LLC, an affiliate to Alvogen, Inc. (Alvogen), for cash proceeds of $130.3 million. The total value included $75.0 million in cash at closing, with the balance receivable as 75% of Alvogen’s first $70.0 million of Gralise net sales after the closing (consideration receivable). Alvogen also paid for certain inventories relating to Gralise. On June 3, 2020, the Company entered into an agreement with Alvogen to settle the remaining balance of $39.7 million in consideration receivable, whereby the Company reduced the consideration receivable by $0.9 million and Alvogen paid $38.8 million in cash.

Basis of Presentation
 
The Company’s consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) and U.S. Securities and Exchange Commission (SEC) regulations for annual reporting. Certain amounts in prior periods have been reclassified to conform with current period presentation.

In connection with the preparation of the financial statements for the year ended December 31, 2021, the Company evaluated whether there were conditions and events, considered in the aggregate, which raised substantial doubt as to the entity's ability to continue as a going concern within twelve months after the date of the issuance of these financial statements noting that there did not appear to be evidence of substantial doubt of the entity's ability to continue as a going concern.

Stock Split

On May 18, 2021, the Company effected a 1-for-4 reverse stock split of its issued and outstanding common stock. The par value of the common stock was not adjusted as a result of the reverse stock split. All common stock share and per-share data included in these financial statements have been retrospectively adjusted to reflect the effect of the reverse stock split for all periods presented.

Revenue Reclassification

During the third quarter of 2021, the Company made certain reclassifications within Total Revenues related to product sales adjustments for previously divested products. Product sales adjustments for previously divested products were reclassified from Product sales, net to Other revenue on the Consolidated Statements of Comprehensive Income, which impacted previously reported amounts for the year ended December 31, 2020. The reclassifications were made so the line item Product sales, net would reflect net sales of the Company’s current commercialized products. Prior period results were recast to conform with these changes and resulted in an increase to Other revenue and an equal and offsetting decrease to Product sales, net of $1.4 million for the year ended December 31, 2020, respectively. Total net revenue as previously reported remains unchanged.

Impact of COVID-19 on our Business

Following the outbreak of COVID-19 during early 2020, the Company’s priority was and remains the health and safety of its employees, their families, and the patients it serves. Because COVID-19 impacted the Company’s ability to see in-person providers who prescribe our products, the Company transformed its commercial approach during 2020 and increased virtual visits, ultimately eliminating its in-person sales force in favor of a digital sales strategy. Additionally, due to the
limitations on elective surgeries and changes in patient behavior since the outbreak of COVID-19, the Company has experienced a decline and subsequent volatility in prescriptions associated with those elective procedures. The extent to which the Company’s operations may continue to be impacted by the COVID-19 pandemic will depend largely on future developments, which are highly uncertain and cannot be accurately predicted, including actions by government authorities to contain the outbreak, the emergence of new COVID-19 variants and the related potential for new surges in infections and the impacts of increases in virtual physician visits on prescriber behavior. For example, although many public health restrictions have eased, future surges could result in additional restrictions or other factors that may contribute to decreases in elective procedures. The impact of the pandemic on the global financial markets may reduce the Company’s ability to access capital, which could negatively impact its liquidity. The Company does not yet know the full extent of potential delays or impacts on its business, financing or on healthcare systems or the global economy as a whole. However, these effects could have a material impact on the Company’s liquidity, capital resources, operations and business and those of the third parties on which it relies, including suppliers and distributors.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates
 
The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Estimates are used when accounting for amounts recorded in connection with acquisitions, including initial fair value determinations of assets and liabilities as well as subsequent fair value measurements. Additionally, estimates are used in determining items such as product returns, rebates, evaluation of impairment of intangible assets, fair value of contingent consideration obligation and taxes on income. Although management believes these estimates are based upon reasonable assumptions within the bounds of its knowledge of the Company, actual results could differ materially from these estimates.

Segment Information

The Company manages its business within one reportable segment. Segment information is consistent with how management reviews the business, makes investing and resource allocation decisions and assesses operating performance. To date, substantially all of the Company’s revenues from product sales are related to sales in the U.S.

Cash, Cash Equivalents
 
Cash and cash equivalents include cash in readily available checking and money market funds. We consider all highly liquid investments purchased with a maturity of three months or less on the date of purchase to be cash equivalents. Cash equivalents are carried at cost, which approximates fair value.
 
Accounts Receivable
 
Trade accounts receivable are recorded net of allowances for cash discounts for prompt payment. To date the Company has not recorded a bad debt allowance since the majority of its product revenue comes from sales to a limited number of financially sound companies who have historically paid their balances timely. The need for a bad debt allowance is evaluated each reporting period based on the Company’s assessment of the credit worthiness of its customers or any other potential circumstances that could result in bad debt.
 
Inventories
 
Inventories are stated at the lower of cost or net realizable value with cost determined by specific manufactured lot. Inventories consist of costs of the active pharmaceutical ingredient, contract manufacturing and packaging costs. Additionally, the Company writes off the value of inventory for potentially excess, dated or obsolete inventories based on an analysis of inventory on hand and projected demand.

Cost of sales includes the cost of inventory sold or reserved, which includes manufacturing and supply chain costs, product shipping and handling costs, and product royalties.
Property and Equipment
 
Property and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, as follows:
 
Furniture and office equipment
3 - 5 years
Machinery and equipment
5 - 7 years
Laboratory equipment
3 - 5 years
Leasehold improvementsShorter of estimated useful life or lease term

Intangible Assets (other than goodwill)
 
Intangible assets, other than goodwill, consist of product rights that are accounted for as definite-lived intangible assets subject to amortization. The Company determines the fair value of acquired intangible assets as of the acquisition date. Discounted cash flow models are typically used in these valuations, which require the use of significant estimates and assumptions, including but not limited to, developing appropriate discount rates and estimating future cash flows from product sales and related expenses. The fair value recorded is amortized on a straight-line basis over the estimated useful life of the asset. The Company estimated the useful life of the assets by considering competition by products prescribed for the same indication, the likelihood and estimated future entry of non-generic and generic competition for the same or similar indication and other related factors.

Impairment of Long-lived Assets

The Company evaluates long-lived assets, including property and equipment and product rights, for impairment whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. Pursuant to ASC 360, Impairment Testing: Long Lived Assets Classified as Held and Used, the Company groups its long-lived assets, including purchased developed technology and trademarks, at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other assets and liabilities. The Company estimates the future net undiscounted cash flows expected to be generated from the use of the long-lived asset group and its eventual disposition. An impairment loss would be recognized when estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition are less than its carrying amount. The impairment loss is calculated as the excess of the carrying amount over the fair value.

Acquisitions

The Company accounts for acquired businesses using the acquisition method of accounting under ASC 805, Business Combinations (ASC 805), which requires that assets acquired and liabilities assumed be recorded at date of acquisition at their respective fair values. The fair value of the consideration paid, including contingent consideration, is assigned to the underlying net assets of the acquired business based on their respective fair values. Any excess of the purchase price over the estimated fair values of the net assets acquired is recorded as goodwill.

Significant judgments are used in determining the estimated fair values assigned to the assets acquired and liabilities assumed and in determining estimates of useful lives of long-lived assets. Fair value determinations and useful life estimates are based on, among other factors, estimates of expected future net cash flows, estimates of appropriate discount rates used to present value expected future net cash flows, the assessment of each asset’s life cycle, and the impact of competitive trends on each asset’s life cycle and other factors. These judgments can materially impact the estimates used to allocate acquisition date fair values to assets acquired and liabilities assumed and the resulting timing and amounts charged to, or recognized in current and future operating results. For these and other reasons, actual results may vary significantly from estimated results.

Any changes in the fair value of contingent consideration resulting from a change in the underlying inputs is recognized in operating expenses until the contingent consideration arrangement is settled. Changes in the fair value of contingent consideration resulting from the passage of time are recorded within interest expense until the contingent consideration is settled.

If the acquired net assets do not constitute a business under the acquisition method of accounting, the transaction is accounted for as an asset acquisition and no goodwill is recognized. In an asset acquisition, the amount allocated to acquired in-process research and development with no alternative future use is charged to expense at the acquisition date.
Goodwill

Under the purchase method of accounting pursuant to ASC 805, Goodwill is calculated as the excess of the purchase price over the fair value of the assets acquired and liabilities assumed. Goodwill, which is not tax-deductible, is recognized within other long-term assets, and is not amortized but subject to an annual review for impairment. Goodwill is tested for impairment at the reporting unit level at least annually or when a triggering event occurs that could indicate a potential impairment by assessing qualitative factors or performing a quantitative analysis in determining whether it is more likely than not that the fair value of net assets are below their carrying amounts. A reporting unit is the same as, or one level below, an operating segment. Our operations are currently comprised of a single reporting unit.

Revenue Recognition
 
Under ASC 606, Revenue from Contracts with Customers (ASC 606), the Company recognizes revenue when its customer obtains control of the promised goods or services, in an amount that reflects the consideration which the Company expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that the Company determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the Company satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that Company will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract and determines those that are performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation, when (or as) the performance obligation is satisfied. The Company assesses the term of the contract based upon the contractual period in which the Company has enforceable rights and obligations.

Variable consideration arising from sales or usage-based royalties, promised in exchange for a license of the Company’s Intellectual Property, is recognized at the later of (i) when the subsequent product sales occur or (ii) the performance obligation, to which some or all of the sales-based royalty has been allocated, has been satisfied.

The Company recognizes a contract asset relating to its conditional right to consideration for completed performance obligations. Accounts receivable are recorded when the right to consideration becomes unconditional. A contract liability is recorded for payments received in advance of the related performance obligation being satisfied under the contract.

Product Sales

The Company sells commercial products to wholesale distributors and specialty pharmacies. Product sales revenue is recognized when title has transferred to the customer and the customer has assumed the risks and rewards of ownership, which typically occurs on delivery to the customer. The Company’s performance obligation is to deliver product to the customer, and the performance obligation is completed upon delivery. The transaction price consists of a fixed invoice price and variable product sales allowances, which include rebates, discounts and returns. Product sales revenues are recorded net of applicable sales tax and reserves for these product sales allowances. Receivables related to product sales are typically collected one to two months after delivery.

Product Sales Allowances - The Company considers products sales allowances to be variable consideration and estimates and recognizes product sales allowances as a reduction of product sales in the same period the related revenue is recognized. Product sales allowances are based on actual or estimated amounts owed on the related sales. These estimates take into consideration the terms of the Company’s agreements with customers, historical product returns, rebates or discounts taken, estimated levels of inventory in the distribution channel, the shelf life of the product and specific known market events, such as competitive pricing and new product introductions. The Company uses the most likely method in estimating product sales allowances. If actual future results vary from the Company’s estimates, the Company may need to adjust these estimates, which could have an effect on product sales and earnings in the period of adjustment. The Company’s sales allowances include:

Product Returns - The Company allows customers to return product for credit with respect to that product within six months before and up to twelve months after its product expiration date. The Company estimates product returns and associated credit on Zipsor, CAMBIA, NUCYNTA, Gralise, Lazanda and products acquired from Zyla, INDOCIN Products, ZORVOLEX, VIVLODEX and OXAYDO. Estimates for returns are based on historical return trends by product or by return trends of similar products, taking into consideration the shelf life of the product at the time of shipment, shipment and prescription trends, estimated distribution channel inventory levels and consideration of the introduction of competitive
products. The Company did not assume financial responsibility for returns of NUCYNTA previously sold by Janssen Pharma or Lazanda product previously sold by Archimedes Pharma US Inc. Under the Commercialization Agreement with Collegium for NUCYNTA, the divestiture of Lazanda to Slán and the divestiture of Gralise to Alvogen, the Company is only financially responsible for product returns for product that were sold by the Company, which are identified by specific lot numbers.

Shelf lives, from the respective manufacture dates, for the Company’s products range from 24 months to 48 months. Because of the shelf life of the Company’s products and its return policy of issuing credits with respect to product that is returned within six months before and up to 12 months after its product expiration date, there may be a significant period of time between when the product is shipped and when the Company issues credit on a returned product. Accordingly, the Company may have to adjust these estimates, which could have an effect on product sales and earnings in the period of adjustments.

Managed Care Rebates - The Company offers discounts under contracts with certain managed care providers. The Company generally pays managed care rebates one to three months after prescriptions subject to the rebate are filled.

Government Rebates - The Company participates in both Medicaid and Medicare rebate programs. Medicaid provides assistance to certain low income patients based on each individual state’s guidelines regarding eligibility and services. Under the Medicaid rebate programs, the Company pays a rebate to each participating state, generally two to three months after the quarter in which prescriptions subject to the rebate are filled. The Company participates in the Medicare Part D Coverage Gap Discount Program under which it provides rebates on prescriptions that fall within the “donut hole” coverage gap. The Company generally pays Medicare Part D Coverage Gap rebates two to three months after the quarter in which prescriptions subject to the rebate are filled.

Wholesaler and Pharmacy Discounts—The Company offers contractually determined discounts to certain wholesale distributors and specialty pharmacies that purchase directly from it. These discounts are either taken off invoice at the time of shipment or paid to the customer on a quarterly basis one to two months after the quarter in which product was shipped to the customer.

Prompt Pay Discounts - The Company offers cash discounts to its customers (generally 2% of the sales price) as an incentive for prompt payment.

Based on the Company’s experience, the Company expects its customers to comply with the payment terms to earn the cash discount.

Patient Discount Programs - The Company offers patient discount co-pay assistance programs in which patients receive certain discounts off their prescriptions at participating retail and specialty pharmacies. The discounts are reimbursed by the Company to program administrators approximately one month after the prescriptions subject to the discount are filled.

Chargebacks - The Company provides discounts to authorized users of the Federal Supply Schedule (FSS) of the General Services Administration under an FSS contract with the Department of Veterans Affairs and 340B eligible entities. These federal and 340B entities purchase products from the wholesale distributors at a discounted price, and the wholesale distributors then charge back to the Company the difference between the current retail price and the price the federal entity paid for the product.

Royalties and Milestone Revenue

For arrangements that include sales-based royalties and the license is deemed to be the predominant item to which the royalties relate, the Company recognizes royalty revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). The Company currently has the right to receive royalties based on sales of CAMBIA in Canada, which are recognized as revenue when the related sales occur as there are no continuing performance obligations by the Company under those agreements.

For arrangements that include milestones, the Company recognizes such revenue using the most likely method. At the end of each reporting period, the Company re-evaluates the probability or achievement of any potential milestone and any related constraints, and if necessary, adjusts its estimates of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect revenue in the period of adjustment.

Contingent Consideration Obligation
Pursuant to the May 2020 Zyla Merger, the Company assumed a contingent consideration obligation which is measured at fair value. The Company has an obligations to make contingent consideration payments for future royalties to Iroko based upon annual INDOCIN Product net sales over $20.0 million at a 20% royalty through January 2029.

At each reporting date, the Company re-measures the contingent consideration obligation to estimated fair value and any resulting change is recognized in Selling, general and administrative expense in the Company’s Condensed Consolidated Statements of Comprehensive Income. The fair value of the contingent consideration is determined using an option pricing model under the income approach based on estimated INDOCIN product revenues through January 2029 and discounted to present value. The fair value measurement is based on significant inputs not observable in the market and thus represents a Level 3 measurement as defined in fair value measurement accounting.

Leases
In accordance with ASC 842, Leases, the Company assesses contracts for lease arrangements at inception. Operating right-of-use (ROU) assets and liabilities are recognized at the lease commencement date equal to the present value of future lease payments using the implicit, if readily available, or incremental borrowing rate based on the information readily available at the commencement date. ROU assets include any lease payments as of commencement and initial direct costs but exclude any lease incentives. Lease and non-lease components are generally accounted for separately and the Company recognizes operating lease expense straight-line over the term of the lease. Operating leases are included in Other long-term assets, Other current liabilities, and Other long-term liabilities in the Consolidated Balance Sheet.

    The Company accounts for operating leases with an initial term of twelve months or less on a straight-line basis over the lease term in the Consolidated Statements of Comprehensive Income.

Stock Based Compensation
 
    The Company’s stock-based compensation generally includes stock options, restricted stock units (RSUs), performance share units (PSUs), and purchases under the Company’s employee stock purchase plan (ESPP), which was terminated in June 2021. The Company accounts for forfeitures as they occur for each type of award. Stock-based compensation expense related to restricted stock unit awards (RSUs) is based on the market value of the underlying stock on the date of grant and the related expense is recognized ratably over the requisite service period.

The stock-based compensation expense related to performance share units (PSUs) is estimated at grant date based on the fair value of the award. The PSU awards are measured exclusively to the relative total shareholder return (TSR) performance, which is measured against the three-year TSR of a custom index of companies. The actual number of shares awarded is adjusted to between zero and 200% of the target award amount based upon achievement in each of the three independent successive one-year tranches. TSR relative to peers is considered a market condition under applicable authoritative guidance. For PSUs granted with vesting subject to market conditions, the fair value of the award is determined at grant date using the Monte Carlo model, and expense is recognized ratably over the requisite service period regardless of whether or not the market condition is satisfied. The Monte Carlo valuation model considers a variety of potential future share prices for Assertio and our peer companies in a selected market index.

The Company uses the Black-Scholes option valuation model to determine the fair value of stock options and employee stock purchase plan (ESPP) shares. The determination of the fair value of stock-based payment awards on the date of grant using an option valuation model is affected by our stock price as well as assumptions, which include the expected term of the award, the expected stock price volatility, risk-free interest rate and expected dividends over the expected term of the award. The Company uses historical option exercise data to estimate the expected term of the options. The Company estimates the volatility of our common stock price by using the historical volatility over the expected term of the options. The Company bases the risk-free interest rate on U.S. Treasury zero coupon issues with terms similar to the expected term of the options as of the date of grant. The Company does not anticipate paying any cash dividends in the foreseeable future, and therefore, uses an expected dividend yield of zero in the option valuation model. Stock-based compensation expense related to the ESPP and options is recognized on a straight-line basis over its respective term.

Research and Development Expense
 
Research and development (R&D) expenses include salaries, clinical trial costs, consultant fees, supplies, manufacturing costs for research and development programs, allocations of corporate costs, as well as post-marketing clinical studies. All such costs are charged to R&D expense as incurred. These expenses result from the Company’s independent R&D efforts as well as efforts associated with collaborations. The Company reviews and accrues clinical trial expenses based on work performed, which relies on estimates of total costs incurred based on patient enrollment, completion of patient studies and
other events. The Company follows this method since reasonably dependable estimates of the costs applicable to various stages of a research agreement or clinical trial can be made. Accrued clinical costs are subject to revisions as trials progress to completion. Revisions are charged to expense in the period in which the facts that give rise to the revision become known.
 
Advertising Costs
 
Costs associated with advertising are expensed as incurred. Advertising expense for the years ended December 31, 2021 and 2020 were $1.8 million and $0.4 million, respectively.
 
Restructuring
 
Restructuring costs are included in Restructuring charges within the Consolidated Statements of Comprehensive Income. The Company has accounted for these costs in accordance with ASC 420, Exit or Disposal Cost Obligations (ASC 420) and ASC 712, Compensation - Nonretirement Postemployment Benefits (ASC 712). One-time termination benefits are recorded at the time restructuring is communicated to the affected employees. Ongoing benefits are recognized when they are estimable and probable.

Income Taxes
 
The Company records the estimated future tax effects of temporary differences between the tax basis of assets and liabilities and amounts reported in its Consolidated Balance Sheets, as well as operating loss and tax credit carryforwards. The Company follows the guidelines set forth in the applicable accounting guidance regarding the recoverability of any tax assets recorded on the Consolidated Balance Sheets and provide any necessary allowances as required. Determining necessary allowances requires the Company to make assessments about the timing of future events, including the probability of expected future taxable income and available tax planning opportunities. When it is determined that it is more likely than not that some portion or all of the deferred tax assets will not be realized in the future, the deferred tax assets are reduced by a valuation allowance. The valuation allowance is sufficient to reduce the deferred tax assets to the amount determined is more likely than not to be realized. At this time, the Company has recorded a valuation allowance against its net deferred tax assets.
 
The Company is subject to examination of its income tax returns by various tax authorities on a periodic basis. The Company regularly assesses the likelihood of adverse outcomes resulting from such examinations to determine the adequacy of its provision for income taxes. The Company has applied the provisions of the applicable accounting guidance on accounting for uncertainty in income taxes, which requires application of a more‑likely‑than‑not threshold to the recognition and de‑recognition of uncertain tax positions. If the recognition threshold is met, the applicable accounting guidance permits the Company to recognize a tax benefit measured at the largest amount of tax benefit that, in its judgment, is more than 50 percent likely to be realized upon settlement. It further requires that a change in judgment related to the expected ultimate resolution of uncertain tax positions be recognized in earnings in the period of such change.
 
The Company recognizes tax liabilities in accordance with ASC Topic 740, Income Taxes, and adjusts these liabilities when its judgment changes as a result of the evaluation of new information not previously available. Due to the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities. These differences will be reflected as increases or decreases to income tax expense in the period in which they are determined.
 
Concentration of Risk

The Company is subject to credit risk from its accounts receivable related to product sales. The three large, national wholesale distributors represent the vast majority of the Company’s business and represented the following percentage of consolidated revenue by customer and the percentage accounts receivable by customer related to product shipments for the years ended December 31, 2021 and 2020.
Consolidated revenueAccounts receivable related to product sales
2021202020212020
Cardinal Health34 %42 %44 %53 %
McKesson Corporation24 %14 %23 %20 %
AmerisourceBergen Corporation26 %13 %29 %18 %
Collegium— %11 %— %— %
All others16 %20 %%%
Total100 %100 %100 %100 %
 

Accounts receivable balances related to product sales were $43.8 million and $40.8 million for the years ended December 31, 2021 and 2020, respectively. To date, the Company has not experienced any significant bad debt losses with respect to the collection of its accounts receivable and believes that its accounts receivable balances are collectible.

The Company is dependent upon third-party manufacturers to supply product for commercial use. In particular, the Company relies and expects to continue to rely on a small number of manufacturers to supply it with its requirements for all commercialized products. Such production arrangements could be adversely affected by a significant interruption which would negatively impact the supply of final drug product. The Company’s sole commercial suppliers for each of its marketed products, as follows:
INDOCIN Products - Patheon Pharmaceuticals, Inc. (Patheon) and Cosette Pharmaceuticals, Inc;
CAMBIA - MiPharm, S.p.A. and Pharma Packaging Solutions
Otrexup - Antares Pharma, Inc. and Pharmascience Inc.
SPRIX - Jubilant HollisterStier LLC and Sharp Packaging Solutions
Zipsor - Catalent Ontario Limited (Catalent) and Mikart Inc.
OXAYDO - UPM Pharmaceuticals, Inc.
 
Recently Adopted Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13 Financial Instruments-Credit Losses (ASU 2016-13 or Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. The Company adopted this standard on January 1, 2020 and updated its internal controls to include certain forward-looking considerations in the current process of developing and recognizing credit losses for in scope financial assets. Refer to “Note 8. Other Long Term Assets for further discussion on impact of adopting ASU 2016-13.

In June 2018, the FASB issued ASU 2018-18 Collaborative Arrangements (ASU 2018-18), which clarifies the interaction between ASC 808, Collaborative Arrangements (ASC 808) and ASC 606, Revenue from Contracts with Customers (ASC 606). The update clarifies that certain transactions between participants in a collaborative arrangement should be accounted for under ASC 606 when the counterparty is a customer. In addition, the update precludes an entity from presenting consideration from a transaction in a collaborative arrangement as revenue if the counterparty is not a customer for that transaction. The Company adopted the standard as of January 1, 2020 and have applied modified retrospective transition method to the date of initial application of ASC 606. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-15, Accounting for Cloud Computing Arrangements (Subtopic 350-40), which provides new guidance on the accounting for implementation, set-up, and other upfront costs incurred in a hosted cloud computing arrangement. Under the new guidance, entities will apply the same criteria for capitalizing implementation costs as they would for an internal-use software license arrangement. Effective January 1, 2020, the Company adopted the standard using the prospective approach to eligible costs incurred on or after the date of adoption. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13 Fair Value Measurement Disclosure Framework (ASU 2018-03), which is part of a broader disclosure framework project by the FASB to improve the effectiveness of disclosures by more clearly communicating the information to the user. The Company adopted the standard as of January 1, 2020 and included these
disclosures in the consolidated financial statements. The additional elements of this release did not impact the Company's consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (ASU 2019-12): Simplifying the Accounting for Income Taxes which simplifies the accounting for income taxes by removing certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period, and by clarifying and amending existing guidance in order to improve consistent application of and simplify GAAP for other areas of Topic 740. ASU 2019-12 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. The Company early adopted the standard effective January 1, 2020. The new standard was applied to the presentation of the Company’s reacquisition of $19.5 million in equity component of the Company’s Convertible Notes, as a result of the private purchase in February 2020 and tender offer in April 2020.

Recently Issued Accounting Pronouncements

In May 2021, the FASB issued ASU 2021-04, Earnings Per Share (Topic 260), Debt-Modifications and Extinguishments (Subtopic 470-50), Compensation-Stock Compensation (Topic 718), and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options. The amendments in ASU 2021-04 provide guidance to clarify and reduce diversity in an issuer’s accounting for modifications or exchanges of freestanding equity-classified written call options (for example, warrants) that remain equity classified after modification or exchange. The guidance is effective for fiscal years beginning after December 15, 2021, including interim periods therein, and early adoption is permitted. The Company is currently evaluating the impact of the adoption of this principle on the Company’s consolidated financial statements

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires an acquirer in a business combination to recognize and measure contract assets and contract liabilities in accordance with Accounting Standards Codification Topic 606. ASU 2021-08 is effective for fiscal years beginning after December 15, 2022 and early adoption is permitted. While the Company is continuing to assess the timing of adoption and the potential impacts of ASU 2021-08, it does not expect ASU 2021-08 to have a material effect on its consolidated financial statements.