BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
Sep. 30, 2021
Accounting Policies [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 (“GAAP”) for interim financial information and do not include all disclosures normally required in annual consolidated financial statements prepared in accordance with GAAP. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2020 and the related notes included in the Company’s final prospectus dated October 26, 2021 that forms a part of the Company’s Registration Statement on Form S-1 (File No. 333-259988) that was filed with the U.S. Securities and Exchange Commission (“SEC”) pursuant to Rule 424(b)(4) on October 28, 2021 (“Final Prospectus”). The December 31, 2020 condensed consolidated balance sheet was derived from the audited consolidated financial statements as of that date. In management’s opinion, the unaudited interim consolidated financial statements have been prepared on the same basis as the annual financial statements and reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the condensed consolidated financial statements. The operating results for the three and nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the full year or any other future interim or annual period.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of Arteris, Inc. and its wholly-owned subsidiaries. All inter-company transactions and accounts have been eliminated.
Use of Estimates	Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates relate to, among others, revenue recognition, the useful lives of assets, assessment of recoverability of property, plant and equipment, fair values of goodwill and other intangible assets, including impairments, leases, allowances for doubtful accounts, deferred tax assets and related valuation allowance, stock-based compensation, potential reserves relating to litigation and tax matters, collectability of certain receivable, as well as other accruals or reserves. Actual results could differ from those estimates and such differences may be material to the condensed consolidated financial statements.
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject us to concentration of credit risk consist of cash and accounts receivable. The Company maintains cash in checking and savings deposits. Management believes no significant concentration risk exists with respect to cash as in management’s judgment the banks that hold the Company’s cash are financially stable. The Company deposits cash with high-credit-quality financial institutions which, at times, may exceed federally insured amounts. The Company’s accounts receivable are derived principally from revenue earned from customers located in Asia Pacific and the Americas regions.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which simplifies the accounting for income taxes. This Update removes certain exceptions for performing intraperiod tax allocations, recognizing deferred taxes for investments, and calculating income taxes in interim periods. The guidance also simplifies the accounting for franchise taxes, transactions that result in a step-up in the tax basis of goodwill, and the effect of enacted changes in tax laws or rates in interim periods. The Company adopted ASU 2019-12 on January 1, 2021 and the adoption had no material impact on the Company’s unaudited condensed consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and in May 2019 issued ASU No. 2019-05, Credit Losses (Topic 326): Targeted Transition Relief (collectively referred to as “Topic 326”), which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. Topic 326 replaces the existing incurred loss impairment model with a forward-looking expected credit loss model which will result in earlier recognition of credit losses. Topic 326 is effective for the Company for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-14, Retirement Benefits: Changes to the Disclosure Requirements for Defined Benefit and other Postretirement Plan (Subtopic 715-20), that adds, removes, and clarifies disclosures requirements for defined benefit and other postretirement plans. This ASU will be effective for the Company for fiscal years ending after December 15, 2021, with early adoption permitted. The Company is currently evaluating the impact that the standard will have on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This ASU will be effective for the Company for fiscal years beginning after December 15, 2020, and all interim periods beginning after December 15, 2021. The Company is currently evaluating the impact that the standard will have on its consolidated financial statements and related disclosures. In August 2020, the FASB issued ASU No. 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). The amendments in this ASU simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts in an entity’s own equity. Among other changes, the guidance removes the liability and equity separation models for convertible instruments. Instead, entities will account for convertible debt instruments wholly as debt unless convertible instruments contain features that require bifurcation as a derivative or that result in substantial premiums accounted for as paid-in capital. The guidance also requires the application of the if-converted method to calculate the impact of convertible instruments on diluted earnings per share. The guidance is effective for the Company for fiscal years beginning after December 15, 2023, with early adoption permitted for fiscal years beginning after December 15, 2020, and can be adopted on either a retrospective or modified retrospective basis. The Company is currently evaluating the impact that the standard will have on its consolidated financial statements and related disclosures.
Fair Value Measurements	Assets Measured and Recorded at Fair Value on a Non-Recurring Basis Certain non-financial assets, such as intangible assets and property, plant and equipment, are remeasured at fair value only if an impairment or observable price adjustment is recognized in the current period. Financial Instruments Not Recorded at Fair Value on a Recurring Basis Financial instruments not recorded at fair value on a recurring basis include the term loan and vendor financing arrangements. The aggregate carrying value of the term loan and vendor financing agreements were $1.2 million and $1.9 million as of September 30, 2021 and December 31, 2020, respectively. The estimated fair values of these financial instruments approximate their carrying values and are categorized as Level 2 within the fair value hierarchy based on the nature of the fair value inputs. The Company’s borrowings under its term loan facility and vendor financing arrangements are classified within Level 2 because these borrowings are not actively traded and have a variable interest rate structure based upon market rates currently available to the Company for debt with similar terms and maturities.
Indemnifications	The Company enters into indemnification agreements in the ordinary course of business. Pursuant to these agreements, the Company agrees to indemnify, hold harmless, and reimburse the indemnified parties for losses suffered or incurred by such indemnified parties. The term of these indemnification agreements is generally perpetual beginning on the execution date of the agreement. The maximum potential amount of future payments the Company could be required to make under these agreements is not determinable. The Company has never incurred costs to defend lawsuits or settle claims related to these agreements. The Company has also indemnified its directors and officers, to the extent legally permissible, against all liabilities reasonably incurred in connection with any action in which such individual may be involved by reason of such individual being or having been a director or executive officer, other than liabilities arising from willful misconduct of the individual.

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2021

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and do not include all disclosures normally required in annual consolidated financial statements prepared in accordance with GAAP. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2020 and the related notes included in the Company’s final prospectus dated October 26, 2021 that forms a part of the Company’s Registration Statement on Form S-1 (File No. 333-259988) that was filed with the U.S. Securities and Exchange Commission (“SEC”) pursuant to Rule 424(b)(4) on October 28, 2021 (“Final Prospectus”). The December 31, 2020 condensed consolidated balance sheet was derived from the audited consolidated financial statements as of that date. In management’s opinion, the unaudited interim consolidated financial statements have been prepared on the same basis as the annual financial statements and reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the condensed consolidated financial statements.

The operating results for the three and nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the full year or any other future interim or annual period.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of Arteris, Inc. and its wholly-owned subsidiaries. All inter-company transactions and accounts have been eliminated.

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates relate to, among others, revenue recognition, the useful lives of assets, assessment of recoverability of property, plant and equipment, fair values of goodwill and other intangible assets, including impairments, leases, allowances for doubtful accounts, deferred tax assets and related valuation allowance, stock-based compensation, potential reserves relating to litigation and tax matters, collectability of certain receivable, as well as other accruals or reserves. Actual results could differ from those estimates and such differences may be material to the condensed consolidated financial statements.

Concentrations of Credit Risk

Financial instruments that potentially subject us to concentration of credit risk consist of cash and accounts receivable. The Company maintains cash in checking and savings deposits. Management believes no significant concentration risk exists with respect to cash as in management’s judgment the banks that hold the Company’s cash are financially stable. The Company deposits cash with high-credit-quality financial institutions which, at times, may exceed federally insured amounts.

The Company’s accounts receivable are derived principally from revenue earned from customers located in Asia Pacific and the Americas regions.

Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which simplifies the accounting for income taxes. This Update removes certain exceptions for performing intraperiod tax allocations, recognizing deferred taxes for investments, and calculating income taxes in interim periods. The guidance also simplifies the accounting for franchise taxes, transactions that result in a step-up in the tax basis of goodwill, and the effect of enacted changes in tax laws or rates in interim periods. The Company adopted ASU 2019-12 on January 1, 2021 and the adoption had no material impact on the Company’s unaudited condensed consolidated financial statements.

Recently Issued Accounting Pronouncements Not Yet Adopted

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and in May 2019 issued ASU No. 2019-05, Credit Losses (Topic 326): Targeted Transition Relief (collectively referred to as “Topic 326”), which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. Topic 326 replaces the existing incurred loss impairment model with a forward-looking expected credit loss model which will result in earlier recognition of credit losses. Topic 326 is effective for the Company for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements and related disclosures.

In August 2018, the FASB issued ASU No. 2018-14, Retirement Benefits: Changes to the Disclosure Requirements for Defined Benefit and other Postretirement Plan (Subtopic 715-20), that adds, removes, and clarifies disclosures requirements for defined benefit and other postretirement plans. This ASU will be effective for the Company for fiscal years ending after December 15, 2021, with early adoption permitted. The Company is currently evaluating the impact that the standard will have on its consolidated financial statements and related disclosures.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This ASU will be effective for the Company for fiscal years beginning after December 15, 2020, and all interim periods beginning after December 15, 2021. The Company is currently evaluating the impact that the standard will have on its consolidated financial statements and related disclosures.

In August 2020, the FASB issued ASU No. 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). The amendments in this ASU simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts in an entity’s own equity. Among other changes, the guidance removes the liability and equity separation models for convertible instruments. Instead, entities will account for convertible debt instruments wholly as debt unless convertible instruments contain features that require bifurcation as a derivative or that result in substantial premiums accounted for as paid-in capital. The guidance also requires the application of the if-converted method to calculate the impact of convertible instruments on diluted earnings per share. The guidance is effective for the Company for fiscal years beginning after December 15, 2023, with early adoption permitted for fiscal years beginning after December 15, 2020, and can be adopted on either a retrospective or modified retrospective basis. The Company is currently evaluating the impact that the standard will have on its consolidated financial statements and related disclosures.

Fair Value Measurements

Assets Measured and Recorded at Fair Value on a Non-Recurring Basis

Certain non-financial assets, such as intangible assets and property, plant and equipment, are remeasured at fair value only if an impairment or observable price adjustment is recognized in the current period.

Financial Instruments Not Recorded at Fair Value on a Recurring Basis

Financial instruments not recorded at fair value on a recurring basis include the term loan and vendor financing arrangements. The aggregate carrying value of the term loan and vendor financing agreements were $1.2 million and $1.9 million as of September 30, 2021 and December 31, 2020, respectively. The estimated fair values of these financial instruments approximate their carrying values and are categorized as Level 2 within the fair value hierarchy based on the nature of the fair value inputs.

The Company’s borrowings under its term loan facility and vendor financing arrangements are classified within Level 2 because these borrowings are not actively traded and have a variable interest rate structure based upon market rates currently available to the Company for debt with similar terms and maturities.

Indemnifications

The Company enters into indemnification agreements in the ordinary course of business. Pursuant to these agreements, the Company agrees to indemnify, hold harmless, and reimburse the indemnified parties for losses suffered or incurred by such indemnified parties. The term of these indemnification agreements is generally perpetual beginning on the execution date of the agreement. The maximum potential amount of future payments the Company could be required to make under these agreements is not determinable. The Company has never incurred costs to defend lawsuits or settle claims related to these agreements. The Company has also indemnified its directors and officers, to the extent legally permissible, against all liabilities reasonably incurred in connection with any action in which such individual may be involved by reason of such individual being or having been a director or executive officer, other than liabilities arising from willful misconduct of the individual.