Description of Operations and Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”) for interim financial information. Accordingly, they do not include all of the information and notes required by US GAAP for complete financial statements. In our opinion, the unaudited condensed consolidated financial statements have been prepared on the same basis as audited consolidated financial statements and include all adjustments, consisting of only normal recurring adjustments, necessary for the fair presentation of our financial position, results of operations, comprehensive income and cash flows. The interim results are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2022 or any other period. The accompanying unaudited condensed consolidated financial statements include the accounts of Innoviva, our wholly-owned subsidiaries and certain variable interest entities for which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. For consolidated entities where we own or are exposed to less than 100% of the economics, we record net income attributable to noncontrolling interest in our unaudited condensed consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2021 filed with the Securities and Exchange Commission (“SEC”) on February 28, 2022, and as amended on March 17, 2022 (“2021 Form 10-K”).
Prior Period Immaterial Correction	Prior Period Immaterial Correction Subsequent to the issuance of the unaudited condensed consolidated financial statements for the three and six months ended June 30, 2021, the Company identified that (i) purchases of equity investments managed by ISP Fund LP for $142.6 million, (ii) sales of equity investments managed by ISP Fund LP for $18.5 million, and (iii) purchase and sales of other investments managed by ISP Fund LP, net for $234.1 million were incorrectly netted in the unaudited condensed consolidated statement of cash flows within the distribution of equity and long-term investments line item. The Company has corrected the presentation in the accompanying unaudited condensed consolidated statement of cash flows for the six months ended June 30, 2021 from amounts previously reported to present such line items separately. The correction did not impact total cash flows from investing activities or the unaudited condensed consolidated balance sheet, statement of income, or statement of comprehensive income. Management assessed the correction on a quantitative and qualitative basis and determined that it is immaterial to the prior period unaudited condensed consolidated financial statements.
Use of Management's Estimates	Use of Management’s Estimates The preparation of unaudited condensed consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the unaudited condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. Management evaluates its significant accounting policies and estimates on an ongoing basis. We base our estimates on historical experience and other relevant assumptions that we believe to be reasonable under the circumstances. These estimates also form the basis for making judgments about the carrying values of assets and liabilities when these values are not readily apparent from other sources.
Certain Risks and Concentrations	Certain Risks and Concentrations Our financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, equity and long-term investments. Although we deposit our cash with multiple financial institutions, our deposits, at times, may exceed federally insured limits.
Segment Reporting	Segment Reporting We operate in a single segment, which is to provide capital return to stockholders by maximizing the potential value of our respiratory assets partnered with GSK. Revenues are generated from our collaborative arrangements and royalty payments from GSK, located in Great Britain. Our facilities are located within the United States.
Variable Interest Entities	Variable Interest Entities We evaluate our ownership, contractual and other interest in entities to determine if they are a variable interest entity (“VIE”). We evaluate whether we have a variable interest in those entities and the nature and extent of those interests. Based on our evaluation, if we determine we are the primary beneficiary of a VIE, we consolidate the entity in our financial statements.
Equity and Long-Term Investments	Equity and Long-Term Investments We invest from time to time in equity and debt securities of private or public companies. If we determine that we have control over these companies under either voting or VIE models, we include them in our unaudited condensed consolidated financial statements. If we determine that we do not have control over these companies under either voting or VIE models, we then determine if we have an ability to exercise significant influence via voting interests, board representation or other business relationships. We may account for the investments where we exercise significant influence using either an equity method of accounting or at fair value by electing the fair value option under Accounting Standards Codification (“ASC”) Topic 825, Financial Instruments. If the fair value option is applied to an investment that would otherwise be accounted for under the equity method, we apply it to all our financial interests in the same entity (equity and debt, including guarantees) that are eligible items. All gains and losses from fair value changes, unrealized and realized, are presented as changes in fair values of equity and long-term investments, net on the unaudited condensed consolidated statements of income. If we conclude that we do not have an ability to exercise significant influence over an investee, we may elect to account for the security without a readily determinable fair value using the measurement alternative under ASC Topic 321, Investments - Equity Securities. This measurement alternative allows us to measure the equity investment at its cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. We also invest in ISP Fund LP, which investments consist of money market funds and equity securities in the healthcare, pharmaceutical and biotechnology industries. Pursuant to the Partnership Agreement entered in December 2020, we became a limited partner of this partnership, and our contributions are subject to a 36-month lock-up period which restriction prevents us from having control and access to the contributions and related investments. These investments are classified as long-term investments on the unaudited condensed consolidated balance sheets.
Revenue Recognition	Revenue Recognition Revenue is recognized when our customer obtains control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. Revenue is recognized through a five-step process: (i) identify the contract with the customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price for the contract; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue as a performance obligation is satisfied. We recognize the royalty revenue on net sales of products with respect to which we have contractual royalty rights in the period in which the royalties are earned. The net sales reports provided by our partner are based on its methodology and assumptions to estimate rebates and returns, which it monitors and adjusts regularly in light of contractual and legal obligations, historical trends, past experience and projected market conditions. Our partner may make significant adjustments to its sales based on actual results recorded, which could cause our royalty revenue to fluctuate. We have the ability to conduct periodic royalty audits to evaluate the information provided by our partner. Royalties are recognized net of amortization of capitalized fees associated with any approval and launch milestone payments made to GSK.
Research and Development Costs	Research and Development Costs Research and development costs are expensed in the period that services are rendered or goods are received. Research and development costs consist of salaries and benefits, laboratory supplies and facility costs, as well as fees paid to third parties that conduct certain research and development activities on behalf of the Company’s consolidated variable interest entity, net of certain external research and development costs reimbursed under the collaboration arrangements of the Company’s consolidated variable interest entity. Non-refundable pre-payments for goods or services that will be used or rendered for future research and development activities are deferred. The Company’s consolidated variable interest entity also utilizes significant judgment and estimates to record accruals for estimated ongoing research costs based on the progress of the studies.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill is recognized as the excess of the purchase price of an acquired entity over the fair value of amount assigned to assets acquired and liabilities assumed in a business combination. Goodwill and intangible assets with indefinite lives is subject to impairment testing at least annually and will be tested for impairment between annual tests if a triggering event occurs, such as changes due to circumstances that would indicate an impairment of the carrying value. Significant judgments are involved in determining if an indicator of impairment has occurred. Intangible assets with definite lives are amortized on a straight-line basis over the remaining useful life of the intangible asset.
Operating Leases	Operating Leases We account for our leases in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 842, “Leases” (“ASC 842”). Right-of-use assets represent our right to use an underlying asset over the lease term and include any lease payments made prior to the lease commencement date and are reduced by lease incentives. Lease liabilities represent the present value of the total lease payments over the lease term, calculated using an estimated incremental borrowing rate. Lease expense is recognized on a straight-line basis over the expected lease term.
Accounting Pronouncement Adopted by the Company	Accounting Pronouncement Adopted by the Company In August 2020, the FASB issued ASU 2020-06, Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which is intended to simplify the accounting for convertible instruments by removing certain separation models in Subtopic 470-20 for convertible instruments. Consequently, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost, as long as no other features require bifurcation and recognition as derivatives. The new standard also requires the if-converted method to be used to calculate diluted earnings per share (“EPS”) for convertible instruments. Effective January 1, 2022, we adopted the new standard using the modified retrospective approach and assessed the effect of this adoption on the accounting for our outstanding convertible notes. The effect of the adoption on our 2025 Notes (as defined below) resulted in a decrease to the opening balance of accumulated deficit of $37.2 million, a reduction to additional paid-in capital of $65.4 million, an increase to the balance of the notes by an aggregate amount of $35.6 million, and an increase to deferred tax assets of $7.4 million. The dilutive EPS of our 2025 Notes will be computed under the if-converted method going forward. There was no financial impact from the implementation of the standard for our 2023 Notes (as defined below). Refer to Note 8, “Debt” for more information.

Description of Operations and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”) for interim financial information. Accordingly, they do not include all of the information and notes required by US GAAP for complete financial statements. In our opinion, the unaudited condensed consolidated financial statements have been prepared on the same basis as audited consolidated financial statements and include all adjustments, consisting of only normal recurring adjustments, necessary for the fair presentation of our financial position, results of operations, comprehensive income and cash flows. The interim results are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2022 or any other period.

The accompanying unaudited condensed consolidated financial statements include the accounts of Innoviva, our wholly-owned subsidiaries and certain variable interest entities for which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. For consolidated entities where we own or are exposed to less than 100% of the economics, we record net income attributable to noncontrolling interest in our unaudited condensed consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2021 filed with the Securities and Exchange Commission (“SEC”) on February 28, 2022, and as amended on March 17, 2022 (“2021 Form 10-K”).

Prior Period Immaterial Correction

Subsequent to the issuance of the unaudited condensed consolidated financial statements for the three and six months ended June 30, 2021, the Company identified that (i) purchases of equity investments managed by ISP Fund LP for $142.6 million, (ii) sales of equity investments managed by ISP Fund LP for $18.5 million, and (iii) purchase and sales of other investments managed by ISP Fund LP, net for $234.1 million were incorrectly netted in the unaudited condensed consolidated statement of cash flows within the distribution of equity and long-term investments line item. The Company has corrected the presentation in the accompanying unaudited condensed consolidated statement of cash flows for the six months ended June 30, 2021 from amounts previously reported to present such line items separately. The correction did not impact total cash flows from investing activities or the unaudited condensed consolidated balance sheet, statement of income, or statement of comprehensive income. Management assessed the correction on a quantitative and qualitative basis and determined that it is immaterial to the prior period unaudited condensed consolidated financial statements.

Use of Management's Estimates

Use of Management’s Estimates

The preparation of unaudited condensed consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the unaudited condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. Management evaluates its significant accounting policies and estimates on an ongoing basis. We base our estimates on historical experience and other relevant assumptions that we believe to be reasonable under the circumstances. These estimates also form the basis for making judgments about the carrying values of assets and liabilities when these values are not readily apparent from other sources.

Certain Risks and Concentrations

Our financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, equity and long-term investments. Although we deposit our cash with multiple financial institutions, our deposits, at times, may exceed federally insured limits.

Segment Reporting

We operate in a single segment, which is to provide capital return to stockholders by maximizing the potential value of our respiratory assets partnered with GSK. Revenues are generated from our collaborative arrangements and royalty payments from GSK, located in Great Britain. Our facilities are located within the United States.

Variable Interest Entities

We evaluate our ownership, contractual and other interest in entities to determine if they are a variable interest entity (“VIE”). We evaluate whether we have a variable interest in those entities and the nature and extent of those interests. Based on our evaluation, if we determine we are the primary beneficiary of a VIE, we consolidate the entity in our financial statements.

Equity and Long-Term Investments

We invest from time to time in equity and debt securities of private or public companies. If we determine that we have control over these companies under either voting or VIE models, we include them in our unaudited condensed consolidated financial statements. If we determine that we do not have control over these companies under either voting or VIE models, we then determine if we have an ability to exercise significant influence via voting interests, board representation or other business relationships.

We may account for the investments where we exercise significant influence using either an equity method of accounting or at fair value by electing the fair value option under Accounting Standards Codification (“ASC”) Topic 825, Financial Instruments. If the fair value option is applied to an investment that would otherwise be accounted for under the equity method, we apply it to all our financial interests in the same entity (equity and debt, including guarantees) that are eligible items. All gains and losses from fair value changes, unrealized and realized, are presented as changes in fair values of equity and long-term investments, net on the unaudited condensed consolidated statements of income.

If we conclude that we do not have an ability to exercise significant influence over an investee, we may elect to account for the security without a readily determinable fair value using the measurement alternative under ASC Topic 321, Investments - Equity Securities. This measurement alternative allows us to measure the equity investment at its cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.

We also invest in ISP Fund LP, which investments consist of money market funds and equity securities in the healthcare, pharmaceutical and biotechnology industries. Pursuant to the Partnership Agreement entered in December 2020, we became a limited partner of this partnership, and our contributions are subject to a 36-month lock-up period which restriction prevents us from having control and access to the contributions and related investments. These investments are classified as long-term investments on the unaudited condensed consolidated balance sheets.

Revenue Recognition

Revenue is recognized when our customer obtains control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. Revenue is recognized through a five-step process: (i) identify the contract with the customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price for the contract; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue as a performance obligation is satisfied.

We recognize the royalty revenue on net sales of products with respect to which we have contractual royalty rights in the period in which the royalties are earned. The net sales reports provided by our partner are based on its methodology and assumptions to estimate rebates and returns, which it monitors and adjusts regularly in light of contractual and legal obligations, historical trends, past experience and projected market conditions. Our partner may make significant adjustments to its sales based on actual results recorded, which could cause our royalty revenue to fluctuate. We have the ability to conduct periodic royalty audits to evaluate the information provided by our partner. Royalties are recognized net of amortization of capitalized fees associated with any approval and launch milestone payments made to GSK.

Research and Development Costs

Research and development costs are expensed in the period that services are rendered or goods are received. Research and development costs consist of salaries and benefits, laboratory supplies and facility costs, as well as fees paid to third parties that conduct certain research and development activities on behalf of the Company’s consolidated variable interest entity, net of certain external research and development costs reimbursed under the collaboration arrangements of the Company’s consolidated variable interest entity. Non-refundable pre-payments for goods or services that will be used or rendered for future research and development activities are deferred. The Company’s consolidated variable interest entity also utilizes significant judgment and estimates to record accruals for estimated ongoing research costs based on the progress of the studies.

Goodwill and Intangible Assets

Goodwill is recognized as the excess of the purchase price of an acquired entity over the fair value of amount assigned to assets acquired and liabilities assumed in a business combination. Goodwill and intangible assets with indefinite lives is subject to impairment testing at least annually and will be tested for impairment between annual tests if a triggering event occurs, such as changes due to circumstances that would indicate an impairment of the carrying value. Significant judgments are involved in determining if an indicator of impairment has occurred. Intangible assets with definite lives are amortized on a straight-line basis over the remaining useful life of the intangible asset.

Operating Leases

We account for our leases in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 842, “Leases” (“ASC 842”). Right-of-use assets represent our right to use an underlying asset over the lease term and include any lease payments made prior to the lease commencement date and are reduced by lease incentives. Lease liabilities represent the present value of the total lease payments over the lease term, calculated using an estimated incremental borrowing rate. Lease expense is recognized on a straight-line basis over the expected lease term.

Accounting Pronouncement Adopted by the Company

In August 2020, the FASB issued ASU 2020-06, Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which is intended to simplify the accounting for convertible instruments by removing certain separation models in Subtopic 470-20 for convertible instruments. Consequently, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost, as long as no other features require bifurcation and recognition as derivatives. The new standard also requires the if-converted method to be used to calculate diluted earnings per share (“EPS”) for convertible instruments.

Effective January 1, 2022, we adopted the new standard using the modified retrospective approach and assessed the effect of this adoption on the accounting for our outstanding convertible notes. The effect of the adoption on our 2025 Notes (as defined below) resulted in a decrease to the opening balance of accumulated deficit of $37.2 million, a reduction to additional paid-in capital of $65.4 million, an increase to the balance of the notes by an aggregate amount of $35.6 million, and an increase to deferred tax assets of $7.4 million. The dilutive EPS of our 2025 Notes will be computed under the if-converted method going forward. There was no financial impact from the implementation of the standard for our 2023 Notes (as defined below). Refer to Note 8, “Debt” for more information.