Summary of Significant Accounting Policies and Use of Estimates (Policies)	9 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]
Description of Business	Description of Business Spectrum Pharmaceuticals, Inc. (“Spectrum,” the “Company,” “we,” “our,” or “us”) is a biopharmaceutical company with a strategy of acquiring, developing, and commercializing novel and targeted oncology therapies. Our in-house organization includes clinical development, regulatory, quality, data management, and commercialization. We have one commercial asset and one drug in late-stage development: •ROLVEDONTM (formerly known as eflapegrastim), a novel long-acting granulocyte colony-stimulating factor (“G-CSF”) for the treatment of chemotherapy-induced neutropenia. On April 11, 2022, we announced that we had received notice that the Biologics License Application (“BLA”) had been accepted and received a Prescription Drug User Fee Act (“PDUFA”) date of September 9, 2022. On September 9, 2022, we received the U.S. Food and Drug Administration’s (“FDA”) marketing approval; and •Poziotinib, a novel irreversible tyrosine kinase inhibitor under investigation for non-small cell lung cancer (“NSCLC”) tumors with various mutations. On December 6, 2021, we announced we submitted our New Drug Application (“NDA”) for poziotinib to the FDA for use in patients with previously treated locally advanced or metastatic NSCLC with HER2 exon 20 insertion mutations. The NDA submission is based on the positive results of Cohort 2 from the ZENITH20 clinical trial, which assessed the safety and efficacy of poziotinib. The product has received Fast Track designation and there is currently no treatment specifically approved by the FDA for this indication. On February 11, 2022, we announced that we had received notice that the NDA had been accepted and received a PDUFA action date of November 24, 2022. On September 22, 2022, we met with the FDA’s Oncologic Drugs Advisory Committee (“ODAC”). ODAC voted 9-4 that the current benefits of poziotinib did not outweigh its risks. Our business strategy is the development of late-stage assets through commercialization and the sourcing of additional assets that are synergistic with our existing portfolio (through purchase acquisitions, in-licensing transactions, or co-development and marketing arrangements).
Basis Presentation	Basis of PresentationInterim Financial StatementsThe interim financial data for the three and nine months ended September 30, 2022 and 2021 is unaudited and is not necessarily indicative of our operating results for a full year. We believe the interim data includes normal and recurring adjustments necessary for a fair presentation of our financial results for the three and nine months ended September 30, 2022 and 2021. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to the Securities and Exchange Commission (“SEC”) rules and regulations relating to interim financial statements. Certain prior period amounts have been reclassified for consistency with the current year presentation. The accompanying Condensed Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements and Notes thereto included within our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 (filed with the SEC on March 17, 2022).
Principles of Consolidation	Principles of Consolidation The accompanying Condensed Consolidated Financial Statements have been prepared in accordance with GAAP and with the rules and regulations of the SEC. These financial statements include the financial position, results of operations, and cash flows of Spectrum and its subsidiaries, all of which are wholly-owned. All inter-company accounts and transactions among these legal entities have been eliminated in consolidation. Substantially all of the accumulated other comprehensive loss is comprised of foreign currency translation adjustments at September 30, 2022.
Operating Segment	Operating SegmentWe operate one reportable operating segment that is focused exclusively on developing and marketing oncology and hematology drug products. For the three and nine months ended September 30, 2022 and 2021, all of our operating costs and expenses were solely attributable to these activities (and as applicable, classified as “discontinued” within the accompanying Condensed Consolidated Statements of Operations).
Use of Estimates	The preparation of financial statements in conformity with GAAP requires our management to make estimates and assumptions that affect our reported amounts of assets, liabilities, revenues, and expenses. These amounts may materially differ from the amounts ultimately realized and reported due to the inherent uncertainty of any estimate or assumption. On an on-going basis, our management evaluates (as applicable) its most critical estimates and assumptions, including those related to: (i) the realization of our tax assets and estimates of our tax liabilities; (ii) the fair value of our investments; (iii) the valuation of our stock options and the periodic expense recognition of stock-based compensation; (iv) the potential outcome of our ongoing or threatened litigation; and (v) the future undiscounted cash flows and revenues, as well as assesses our ability to fund our operations for at least the next twelve months from the date of issuance of these financial statements.
Cash and Cash Equivalents	Cash and Cash EquivalentsCash and cash equivalents consist of bank deposits and highly liquid investments with maturities of three months or less from the purchase date.
Marketable Securities	Marketable SecuritiesMarketable securities consist of our holdings in equity securities (including mutual funds), bank CDs, government-related debt securities, and corporate debt securities. For equity securities and mutual funds, any realized or unrealized gains (losses) are recognized in “other income (expense), net” within the Condensed Consolidated Statements of Operations. Debt securities and bank CDs are classified as “available-for-sale” investments and (1) realized gains (losses) are recognized in “other income (expense), net” within the Condensed Consolidated Statements of Operations and (2) unrealized gains (losses) are recognized as a component of “accumulated other comprehensive loss” within the Condensed Consolidated Statements of Stockholders’ Equity.
Inventory	Inventory We value our inventory at the lower of cost or net realizable value. Inventory cost is determined on a first-in, first-out basis. We regularly review our inventory quantities and when appropriate record a provision for obsolete and excess inventory to derive its new cost basis, which takes into account our sales forecast and corresponding expiry dates. We have not recognized a provision for obsolete and excess inventory through September 30, 2022. We received FDA approval for ROLVEDON on September 9, 2022, and on that date began capitalizing inventory purchases of saleable product from certain suppliers. Prior to FDA approval, all saleable product purchased from such suppliers were included as a component of research and development expense, as we were unable to assert that the inventory had future economic benefit until we had received FDA approval.
Property and Equipment, Net	Property and Equipment, NetOur property and equipment, net, is stated at historical cost, and is depreciated on a straight-line basis over an estimated useful life that corresponds with its designated asset category. We evaluate the recoverability of long-lived assets (which includes property and equipment) whenever events or changes in circumstances in our business indicate that the asset’s carrying amount may not be recoverable. Recoverability is measured by a comparison of the carrying amount to the net undiscounted cash flows expected to be generated by the asset group. An impairment loss would be recorded for the excess of net carrying value over the fair value of the asset impaired. The fair value is estimated based on expected discounted future cash flows or other methods such as orderly liquidation value based on assumptions of asset class and observed market data.
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation expense for equity awards granted to our employees and members of our Board of Directors is recognized on a straight-line basis over each award’s vesting period. Recognized compensation expense is net of an estimated forfeiture rate, representing the percentage of awards that are expected to be forfeited prior to vesting, and is ultimately adjusted for actual forfeitures. We use the Black-Scholes option pricing model to determine the fair value of stock options and stock appreciation rights (as of the date of grant) that have service conditions for vesting. We use the Monte Carlo valuation model to value equity awards (as of the date of grant) that have combined market conditions and service conditions for vesting. The recognition of stock-based compensation expense and the initial calculation of stock option fair value requires certain assumptions, including (a) the pre-vesting forfeiture rate of the award, (b) the expected term that the stock option will remain outstanding, (c) our stock price volatility over the expected term (and that of our designated peer group with respect to certain market-based awards), (d) zero dividend yield, and (e) the prevailing risk-free interest rate for the period matching the expected term. With regard to (a)-(e) above: we estimate forfeiture rates based on our employees’ overall forfeiture history, which we believe will be representative of future results. We estimate the expected term of stock options granted based on our employees’ historical exercise patterns, which we believe will be representative of their future behavior. We estimate the volatility of our common stock on the date of grant based on the historical volatility of our common stock for a look-back period that corresponds with the expected term. We estimate the risk-free interest rate based upon the U.S. Department of the Treasury yields in effect at award grant, for a period equaling the expected term of the stock option and we estimate a zero dividend yield.
Basic and Diluted Net Loss per Share	Basic and Diluted Net Loss per ShareWe calculate basic and diluted net loss per share using the weighted average number of common shares outstanding during the periods presented. In periods of a net loss, basic and diluted loss per share is the same. For the diluted earnings per share calculation, we adjust the weighted average number of common shares outstanding to include only stock options, warrants, and other common stock equivalents outstanding during the period to the extent that they are dilutive.
Income Taxes	Income Taxes Deferred tax assets and liabilities are recorded based on the estimated future tax effects of temporary differences between the tax basis of assets and liabilities and amounts reported in the financial statements, as well as operating losses and tax credit carry forwards using enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. Realization of deferred tax assets is dependent upon future earnings, the timing and amount of which are uncertain. We apply an estimated annual effective tax rate (“ETR”) approach for calculating a tax provision for interim periods. Our ETR differs from the U.S. federal statutory tax rate primarily as a result of nondeductible expenses and the impact of a valuation allowance on our deferred tax assets, which we record because we believe that, based upon a weighting of positive and negative factors, it is more likely than not that these deferred tax assets will not be realized. If/when we were to determine that our deferred tax assets are realizable, an adjustment to the corresponding valuation allowance would increase our net income in the period that such determination was made. In the event that we are assessed interest and/or penalties from taxing authorities that have not been previously accrued, such amounts would be included in “provision for income taxes from continuing operations” within the accompanying Condensed Consolidated Statements of Operations for the period in which we received the notice.
Research and Development Expenses	Research and Development ExpensesOur research and development costs are expensed as incurred. Research and development costs consist primarily of salaries, benefits, and other staff-related costs including associated stock-based compensation, laboratory supplies, clinical trial and related clinical manufacturing costs, costs related to manufacturing preparations, fees paid to other entities that conduct certain research and development activities on our behalf and payments made pursuant to license agreements. Clinical trial and other development costs incurred by third parties are expensed as the contracted work is performed. We accrue for costs incurred as the services are being provided by monitoring the status of activities and the invoices received from our external service providers. We adjust our accruals as actual costs become known. Where contingent milestone payments are due to third parties under research and development or license agreements, the milestone payment obligations are expensed in the earliest period that we determine the respective milestone achievement is probable or has occurred.
Debt Issuance Costs	Debt Issuance CostsDebt issuance costs incurred in connection with the Term Loans are classified on the consolidated balance sheet as a direct deduction from the carrying amount of the related debt liability. These expenses are deferred and amortized as part of interest expense in the consolidated statement of operations using the effective interest rate method over the term of the debt agreement. Refer to Note 5 for additional information on the Term Loans.
Recently Issued Accounting Standards	Recently Issued Accounting Standards There are several new accounting pronouncements issued by the Financial Accounting Standards Board (“FASB”), which we do not believe had or will have a material impact on our consolidated financial statements, unless otherwise described below. In June 2022, the FASB issued Accounting Standards Update No. 2022-03, Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. This standard clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. This standard becomes effective for us on January 1, 2024, and is not expected to have a material impact on our condensed consolidated financial statements and related disclosures.

Summary of Significant Accounting Policies and Use of Estimates (Policies)

9 Months Ended

Sep. 30, 2022

Spectrum Pharmaceuticals, Inc. (“Spectrum,” the “Company,” “we,” “our,” or “us”) is a biopharmaceutical company with a strategy of acquiring, developing, and commercializing novel and targeted oncology therapies. Our in-house organization includes clinical development, regulatory, quality, data management, and commercialization.

We have one commercial asset and one drug in late-stage development:

•ROLVEDONTM (formerly known as eflapegrastim), a novel long-acting granulocyte colony-stimulating factor (“G-CSF”) for the treatment of chemotherapy-induced neutropenia. On April 11, 2022, we announced that we had received notice that the Biologics License Application (“BLA”) had been accepted and received a Prescription Drug User Fee Act (“PDUFA”) date of September 9, 2022. On September 9, 2022, we received the U.S. Food and Drug Administration’s (“FDA”) marketing approval; and

•Poziotinib, a novel irreversible tyrosine kinase inhibitor under investigation for non-small cell lung cancer (“NSCLC”) tumors with various mutations. On December 6, 2021, we announced we submitted our New Drug Application (“NDA”) for poziotinib to the FDA for use in patients with previously treated locally advanced or metastatic NSCLC with HER2 exon 20 insertion mutations. The NDA submission is based on the positive results of Cohort 2 from the ZENITH20 clinical trial, which assessed the safety and efficacy of poziotinib. The product has received Fast Track designation and there is currently no treatment specifically approved by the FDA for this indication. On February 11, 2022, we announced that we had received notice that the NDA had been accepted and received a PDUFA action date of November 24, 2022. On September 22, 2022, we met with the FDA’s Oncologic Drugs Advisory Committee (“ODAC”). ODAC voted 9-4 that the current benefits of poziotinib did not outweigh its risks.

Our business strategy is the development of late-stage assets through commercialization and the sourcing of additional assets that are synergistic with our existing portfolio (through purchase acquisitions, in-licensing transactions, or co-development and marketing arrangements).

Basis Presentation

Basis of PresentationInterim Financial StatementsThe interim financial data for the three and nine months ended September 30, 2022 and 2021 is unaudited and is not necessarily indicative of our operating results for a full year. We believe the interim data includes normal and recurring adjustments necessary for a fair presentation of our financial results for the three and nine months ended September 30, 2022 and 2021. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to the Securities and Exchange Commission (“SEC”) rules and regulations relating to interim financial statements. Certain prior period amounts have been reclassified for consistency with the current year presentation. The accompanying Condensed Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements and Notes thereto included within our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 (filed with the SEC on March 17, 2022).

Principles of Consolidation

The accompanying Condensed Consolidated Financial Statements have been prepared in accordance with GAAP and with the rules and regulations of the SEC. These financial statements include the financial position, results of operations, and cash flows of Spectrum and its subsidiaries, all of which are wholly-owned. All inter-company accounts and transactions among these legal entities have been eliminated in consolidation. Substantially all of the accumulated other comprehensive loss is comprised of foreign currency translation adjustments at September 30, 2022.

Operating Segment

Operating SegmentWe operate one reportable operating segment that is focused exclusively on developing and marketing oncology and hematology drug products. For the three and nine months ended September 30, 2022 and 2021, all of our operating costs and expenses were solely attributable to these activities (and as applicable, classified as “discontinued” within the accompanying Condensed Consolidated Statements of Operations).

Use of Estimates

The preparation of financial statements in conformity with GAAP requires our management to make estimates and assumptions that affect our reported amounts of assets, liabilities, revenues, and expenses. These amounts may materially differ from the amounts ultimately realized and reported due to the inherent uncertainty of any estimate or assumption. On an on-going basis, our management evaluates (as applicable) its most critical estimates and assumptions, including those related to: (i) the realization of our tax assets and estimates of our tax liabilities; (ii) the fair value of our investments; (iii) the valuation of our stock options and the periodic expense recognition of stock-based compensation; (iv) the potential outcome of our ongoing or threatened litigation; and (v) the future undiscounted cash flows and revenues, as well as assesses our ability to fund our operations for at least the next twelve months from the date of issuance of these financial statements.

Cash and Cash Equivalents

Cash and Cash EquivalentsCash and cash equivalents consist of bank deposits and highly liquid investments with maturities of three months or less from the purchase date.

Marketable Securities

Marketable SecuritiesMarketable securities consist of our holdings in equity securities (including mutual funds), bank CDs, government-related debt securities, and corporate debt securities. For equity securities and mutual funds, any realized or unrealized gains (losses) are recognized in “other income (expense), net” within the Condensed Consolidated Statements of Operations. Debt securities and bank CDs are classified as “available-for-sale” investments and (1) realized gains (losses) are recognized in “other income (expense), net” within the Condensed Consolidated Statements of Operations and (2) unrealized gains (losses) are recognized as a component of “accumulated other comprehensive loss” within the Condensed Consolidated Statements of Stockholders’ Equity.

Inventory

We value our inventory at the lower of cost or net realizable value. Inventory cost is determined on a first-in, first-out basis. We regularly review our inventory quantities and when appropriate record a provision for obsolete and excess inventory to derive its new cost basis, which takes into account our sales forecast and corresponding expiry dates. We have not recognized a provision for obsolete and excess inventory through September 30, 2022.

We received FDA approval for ROLVEDON on September 9, 2022, and on that date began capitalizing inventory purchases of saleable product from certain suppliers. Prior to FDA approval, all saleable product purchased from such suppliers were included as a component of research and development expense, as we were unable to assert that the inventory had future economic benefit until we had received FDA approval.

Property and Equipment, Net

Property and Equipment, NetOur property and equipment, net, is stated at historical cost, and is depreciated on a straight-line basis over an estimated useful life that corresponds with its designated asset category. We evaluate the recoverability of long-lived assets (which includes property and equipment) whenever events or changes in circumstances in our business indicate that the asset’s carrying amount may not be recoverable. Recoverability is measured by a comparison of the carrying amount to the net undiscounted cash flows expected to be generated by the asset group. An impairment loss would be recorded for the excess of net carrying value over the fair value of the asset impaired. The fair value is estimated based on expected discounted future cash flows or other methods such as orderly liquidation value based on assumptions of asset class and observed market data.

Stock-Based Compensation

Stock-based compensation expense for equity awards granted to our employees and members of our Board of Directors is recognized on a straight-line basis over each award’s vesting period. Recognized compensation expense is net of an estimated forfeiture rate, representing the percentage of awards that are expected to be forfeited prior to vesting, and is ultimately adjusted for actual forfeitures. We use the Black-Scholes option pricing model to determine the fair value of stock options and stock appreciation rights (as of the date of grant) that have service conditions for vesting. We use the Monte Carlo valuation model to value equity awards (as of the date of grant) that have combined market conditions and service conditions for vesting.

The recognition of stock-based compensation expense and the initial calculation of stock option fair value requires certain assumptions, including (a) the pre-vesting forfeiture rate of the award, (b) the expected term that the stock option will remain outstanding, (c) our stock price volatility over the expected term (and that of our designated peer group with respect to certain market-based awards), (d) zero dividend yield, and (e) the prevailing risk-free interest rate for the period matching the expected term.

With regard to (a)-(e) above: we estimate forfeiture rates based on our employees’ overall forfeiture history, which we believe will be representative of future results. We estimate the expected term of stock options granted based on our employees’ historical exercise patterns, which we believe will be representative of their future behavior. We estimate the volatility of our common stock on the date of grant based on the historical volatility of our common stock for a look-back period that corresponds with the expected term. We estimate the risk-free interest rate based upon the U.S. Department of the Treasury yields in effect at award grant, for a period equaling the expected term of the stock option and we estimate a zero dividend yield.

Basic and Diluted Net Loss per Share

Basic and Diluted Net Loss per ShareWe calculate basic and diluted net loss per share using the weighted average number of common shares outstanding during the periods presented. In periods of a net loss, basic and diluted loss per share is the same. For the diluted earnings per share calculation, we adjust the weighted average number of common shares outstanding to include only stock options, warrants, and other common stock equivalents outstanding during the period to the extent that they are dilutive.

Income Taxes

Deferred tax assets and liabilities are recorded based on the estimated future tax effects of temporary differences between the tax basis of assets and liabilities and amounts reported in the financial statements, as well as operating losses and tax credit carry forwards using enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. Realization of deferred tax assets is dependent upon future earnings, the timing and amount of which are uncertain.

We apply an estimated annual effective tax rate (“ETR”) approach for calculating a tax provision for interim periods. Our ETR differs from the U.S. federal statutory tax rate primarily as a result of nondeductible expenses and the impact of a valuation allowance on our deferred tax assets, which we record because we believe that, based upon a weighting of positive and negative factors, it is more likely than not that these deferred tax assets will not be realized. If/when we were to determine that our deferred tax assets are realizable, an adjustment to the corresponding valuation allowance would increase our net income in the period that such determination was made.

In the event that we are assessed interest and/or penalties from taxing authorities that have not been previously accrued, such amounts would be included in “provision for income taxes from continuing operations” within the accompanying Condensed Consolidated Statements of Operations for the period in which we received the notice.

Research and Development Expenses

Research and Development ExpensesOur research and development costs are expensed as incurred. Research and development costs consist primarily of salaries, benefits, and other staff-related costs including associated stock-based compensation, laboratory supplies, clinical trial and related clinical manufacturing costs, costs related to manufacturing preparations, fees paid to other entities that conduct certain research and development activities on our behalf and payments made pursuant to license agreements. Clinical trial and other development costs incurred by third parties are expensed as the contracted work is performed. We accrue for costs incurred as the services are being provided by monitoring the status of activities and the invoices received from our external service providers. We adjust our accruals as actual costs become known. Where contingent milestone payments are due to third parties under research and development or license agreements, the milestone payment obligations are expensed in the earliest period that we determine the respective milestone achievement is probable or has occurred.

Debt Issuance Costs

Debt Issuance CostsDebt issuance costs incurred in connection with the Term Loans are classified on the consolidated balance sheet as a direct deduction from the carrying amount of the related debt liability. These expenses are deferred and amortized as part of interest expense in the consolidated statement of operations using the effective interest rate method over the term of the debt agreement. Refer to Note 5 for additional information on the Term Loans.

Recently Issued Accounting Standards

There are several new accounting pronouncements issued by the Financial Accounting Standards Board (“FASB”), which we do not believe had or will have a material impact on our consolidated financial statements, unless otherwise described below.

In June 2022, the FASB issued Accounting Standards Update No. 2022-03, Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. This standard clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. This

standard becomes effective for us on January 1, 2024, and is not expected to have a material impact on our condensed consolidated financial statements and related disclosures.