Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements include Impinj, Inc. and its wholly owned subsidiaries. We have eliminated intercompany balances and transactions in consolidation. We have prepared these condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles ("GAAP"), and applicable rules and regulations of the Securities and Exchange Commission ("SEC"), regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Accordingly, these interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes as of and for the year ended December 31, 2023 included in Impinj, Inc.’s Annual Report on Form 10-K, which was filed with the SEC on February 12, 2024. The unaudited condensed consolidated interim financial statements, in the opinion of management, reflect all adjustments, comprising normal recurring adjustments, necessary to state fairly our financial position, results of operations and our cash flows for the periods presented. Interim results are not necessarily indicative of the results for a full year or for any other future period.
Use of Estimates	Use of Estimates Preparing financial statements in conformity with GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and related disclosures as of the date of the financial statements, as well as the reported revenue and expenses during the periods presented. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, sales incentives, percentage completion of development contracts, inventory excess and obsolescence, income taxes and fair value of stock awards. To the extent there are material differences between our estimates, judgments, or assumptions and actual results, our financial statements will be affected.
Licensing of Intellectual Property	Licensing of Intellectual Property On March 13, 2024, we and NXP Semiconductors N.V. ("NXP") entered into a Settlement and Patent Cross-License Agreement (the “Settlement Agreement”). Under the Settlement Agreement, NXP made a one-time payment of $45 million and agreed to make annual license fee payments on April 1 of each year, starting on April 1, 2024, until the termination of the Settlement Agreement. The annual license fee payment for 2024 is $15 million and will increase each subsequent year by a fixed percentage. We allocated the consideration from the Settlement Agreement to the related components of the agreement. We recorded the $45 million payment in income from settlement of litigation in the condensed consolidated statements of operations upon receipt. We will recognize the license fee, which relates to annual usage of the license from April 1 to March 31 of each applicable year, as revenue in the second quarter of each year for as long as NXP is still using the Indicator Patents as specified in the Settlement Agreement. We recognize revenue from licensing the right to use functional intellectual property, such as the Settlement Agreement discussed above, at the point in time the control of the license transfers to the customer, which is generally upon delivery, or as usage occurs. See Note 6 Commitments and Contingencies for additional details of the Settlement Agreement with NXP.
Recently Issued Accounting Standards Not Yet Adopted	Recently Issued Accounting Standards Not Yet Adopted In November 2023, the FASB released ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which amends reportable segment requirements, primarily through enhanced disclosures about significant segment expenses, including for public entities that have a single reportable segment. The standard is effective for fiscal years beginning after December 31, 2023 and interim periods within fiscal years beginning after December 31, 2024. We are currently evaluating any impact of this standard on our financial statement disclosures. In December 2023, the FASB released ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which amends income tax disclosure requirements to enhance the transparency and decision usefulness for users of the financial statements. The standard is effective for fiscal years beginning after December 31, 2024. We are currently evaluating any impact of this standard on our financial statement disclosures.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

The accompanying condensed consolidated financial statements include Impinj, Inc. and its wholly owned subsidiaries. We have eliminated intercompany balances and transactions in consolidation. We have prepared these condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles ("GAAP"), and applicable rules and regulations of the Securities and Exchange Commission ("SEC"), regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Accordingly, these interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes as of and for the year ended December 31, 2023 included in Impinj, Inc.’s Annual Report on Form 10-K, which was filed with the SEC on February 12, 2024.

The unaudited condensed consolidated interim financial statements, in the opinion of management, reflect all adjustments, comprising normal recurring adjustments, necessary to state fairly our financial position, results of operations and our cash flows for the periods presented. Interim results are not necessarily indicative of the results for a full year or for any other future period.

Use of Estimates

Preparing financial statements in conformity with GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and related disclosures as of the date of the financial statements, as well as the reported revenue and expenses during the periods presented. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, sales incentives, percentage completion of development contracts, inventory excess and obsolescence, income taxes and fair value of stock awards. To the extent there are material differences between our estimates, judgments, or assumptions and actual results, our financial statements will be affected.

Licensing of Intellectual Property

On March 13, 2024, we and NXP Semiconductors N.V. ("NXP") entered into a Settlement and Patent Cross-License Agreement (the “Settlement Agreement”). Under the Settlement Agreement, NXP made a one-time payment of $45 million and agreed to make annual license fee payments on April 1 of each year, starting on April 1, 2024, until the termination of the Settlement Agreement. The annual license fee payment for 2024 is $15 million and will increase each subsequent year by a fixed percentage. We allocated the consideration from the Settlement Agreement to the related components of the agreement. We recorded the $45 million payment in income from settlement of litigation in the condensed consolidated statements of operations upon receipt. We will recognize the license fee, which relates to annual usage of the license from April 1 to March 31 of each applicable year, as revenue in the second quarter of each year for as long as NXP is still using the Indicator Patents as specified in the Settlement Agreement.

We recognize revenue from licensing the right to use functional intellectual property, such as the Settlement Agreement discussed above, at the point in time the control of the license transfers to the customer, which is generally upon delivery, or as usage occurs. See Note 6 Commitments and Contingencies for additional details of the Settlement Agreement with NXP.

Recently Issued Accounting Standards Not Yet Adopted

In November 2023, the FASB released ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which amends reportable segment requirements, primarily through enhanced disclosures about significant segment expenses, including for public entities that have a single reportable segment. The standard is effective for fiscal years beginning after December 31, 2023 and interim periods within fiscal years beginning after December 31, 2024. We are currently evaluating any impact of this standard on our financial statement disclosures.

In December 2023, the FASB released ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which amends income tax disclosure requirements to enhance the transparency and decision usefulness for users of the financial statements. The standard is effective for fiscal years beginning after December 31, 2024. We are currently evaluating any impact of this standard on our financial statement disclosures.