SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated financial statements included herein have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s Form 10-K filed with the SEC on February 28, 2022. In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and reflect all adjustments, which include normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of September 30, 2022 and the results of operations for the three and nine months ended September 30, 2022 and 2021. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the results to be expected for the full year ending December 31, 2022 or any other future interim or annual period. The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries.
Principles of Consolidation	All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Significant estimates, assumptions and judgments made by management include, among others, inventory valuation, warranty reserve, the determination of the useful lives of property, plant and equipment, fair value of preferred stock warrants, fair value of common stock warrants, fair value of contingent forward contracts liability, estimates of residual value guarantee (“RVG”), valuation of deferred income tax assets and uncertain tax positions, fair value of common stock and other assumptions used to measure stock-based compensation expense, and estimated incremental borrowing rates for assessing operating and financing leases. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. The Company adjusts such estimates and assumptions when facts and circumstances dictate. Changes in those estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.
Reclassifications	Reclassifications Certain prior period balances have been reclassified to conform to the current period presentation in the condensed consolidated financial statements and the accompanying notes.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash The Company considers all highly liquid investments with an original maturity at the date of purchase of three months or less to be cash equivalents. Restricted cash in other current assets and noncurrent assets is primarily related to letters of credit issued to the landlords for certain of the Company’s leasehold facilities.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk consist of cash, cash equivalents, and investments. The Company places its cash primarily with domestic financial institutions that are federally insured within statutory limits, but at times its deposits may exceed federally insured limits.
Concentration of Supply Risk	Concentration of Supply Risk The Company is dependent on its suppliers, the majority of which are single-source suppliers, and the inability of these suppliers to deliver necessary components of its products according to the schedule and at prices, quality levels and volumes acceptable to the Company, or its inability to efficiently manage these components, could have a material adverse effect on the Company’s results of operations and financial condition.
Investments	Investments The Company’s investments in marketable debt securities have been classified and accounted for as available-for-sale and they are stated at fair value. The Company classifies its investments as either short-term or long-term based on each instrument’s underlying contractual maturity date. Unrealized gains and losses on our investments of available-for-sale securities are recorded in accumulated other comprehensive loss which is included within stockholders’ equity. Interest, as well as amortization and accretion of purchase premiums and discounts on our investments of available-for-sale securities are included in Interest income. The cost of securities sold is determined using the specific identification method. Realized gains and losses on the sale of available-for-sale securities are recorded in other income (expense), net.
Vehicle Sales with Residual Value Guarantee	Vehicle Sales with Residual Value Guarantee The Company provides an RVG to its commercial banking partner in connection with its vehicle leasing program. Under the vehicle leasing program, the Company generally receives full payment for the vehicle sales price at the time of delivery, does not bear casualty and credit risks during the lease term, and is contractually obligated (or entitled) to share a portion of the shortfall (or excess) between the resale value realized by the commercial banking partner and a predetermined resale value. During the three and nine months ended September 30, 2022, vehicle sales with RVG totaled $10.1 million. At the lease inception, the Company is required to deposit cash collateral equal to a contractual percentage of the residual value of the leased vehicles with the commercial banking partner. The cash collateral is held in a restricted bank account owned by the commercial banking partner until it is used, as applicable, in settlement of the RVG at the end of the lease term. Cash collateral is recorded in other long-term assets, subject to asset impairment review at each reporting period. The Company accounts for the vehicle leasing program in accordance with ASC 842, Leases, ASC 460, Guarantees and ASC 606, Revenue from Contracts with Customers. The Company is the lessor at inception of a lease and immediately transfers the lease as well as the underlying vehicle to its commercial banking partner, with the transaction being accounted for as a sale under ASC 606. The Company recognizes revenue when control transfers upon delivery when the consumer-lessee takes physical possession of the vehicle, and bifurcates the RVG at fair value and accounts for it as a guarantee liability. The remaining amount of the transaction price is allocated among the performance obligations, including the vehicle, the unspecified over-the-air (“OTA”) software updates and remarketing activities, in proportion to the standalone selling price of the Company’s performance obligations. The guarantee liability represents the estimated amount the Company expects to pay at the end of the lease term. The Company is released from residual risk upon either expiration or settlement of the RVG. The Company evaluates variables such as third-party residual value publications, risk of future price deterioration due to changes in market conditions and reconditioning costs to determine the estimated residual value guarantee liability. As we accumulate more data related to the resale value of our vehicles or as market conditions change, there could be material changes to the estimated guarantee liabilities. As of September 30, 2022, the RVG liability was immaterial.
Government Grants	Government GrantsGovernment grants are recognized when the grants are received, and all the conditions specified in the grant have been met. Grants related to fixed assets are recorded as a deduction in calculating the carrying amount of the related assets and are recognized in profit or loss over the life of a depreciable asset through reduced depreciation expense. Grants received in advance of the acquisition or construction of assets are recorded initially in deferred liability and then as a deduction in calculating the carrying amount of the related fixed assets upon acquisition or construction of the assets. Grant receipts are classified as investing cash inflows on a gross basis on the condensed consolidated statements of cash flows.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In November 2021, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, which requires annual disclosures about transactions with a government that are accounted for by applying a grant or contribution accounting model by analogy. The disclosure requirements include information about the nature of the transactions and the related accounting policy, the line items on the balance sheet and income statement that are affected by the transactions, the amount applicable to each financial statement line and significant terms and conditions of the transactions. The guidance is effective for annual periods beginning after December 15, 2021 and can be applied either prospectively or retrospectively. The Company adopted ASU 2021-10 prospectively on January 1, 2022. The adoption of this ASU did not have an impact to the condensed consolidated financial statements and related disclosures.
Fair Value Measurement	The accounting standard for fair value measurements provides a framework for measuring fair value and requires expanded disclosures regarding fair value measurements. Fair value is defined as the price that would be received for an asset or the “exit price” that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between independent market participants on the measurement date. The Company measures financial assets and liabilities at fair value at each reporting period using a fair value hierarchy, which requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. This hierarchy prioritizes the inputs into three broad levels as follows: •Level 1—Quoted prices (unadjusted) in active markets for identical assets or liabilities. •Level 2—Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. •Level 3—Inputs that are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. Factors used to develop the estimated fair value are unobservable inputs that are not supported by market activity. The sensitivity of the fair value measurement to changes in unobservable inputs may result in a significantly higher or lower measurement.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2022

Basis of Presentation and Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements included herein have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) regarding interim financial reporting. Certain information and disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s Form 10-K filed with the SEC on February 28, 2022.

In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and reflect all adjustments, which include normal recurring adjustments, necessary for the fair statement of the Company’s financial position as of September 30, 2022 and the results of operations for the three and nine months ended September 30, 2022 and 2021. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the results to be expected for the full year ending December 31, 2022 or any other future interim or annual period.

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries.

Principles of Consolidation

All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Significant estimates, assumptions and judgments made by management include, among others, inventory valuation, warranty reserve, the determination of the useful lives of property, plant and equipment, fair value of preferred stock warrants, fair value of common stock warrants, fair value of contingent forward contracts liability, estimates of residual value guarantee (“RVG”), valuation of deferred income tax assets and uncertain tax positions, fair value of common stock and other assumptions used to measure stock-based compensation expense, and estimated incremental borrowing rates for assessing operating and financing leases. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. The Company adjusts such estimates and assumptions when facts and circumstances dictate. Changes in those estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.

Reclassifications

Certain prior period balances have been reclassified to conform to the current period presentation in the condensed consolidated financial statements and the accompanying notes.

Cash, Cash Equivalents and Restricted Cash

The Company considers all highly liquid investments with an original maturity at the date of purchase of three months or less to be cash equivalents.

Restricted cash in other current assets and noncurrent assets is primarily related to letters of credit issued to the landlords for certain of the Company’s leasehold facilities.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentration of credit risk consist of cash, cash equivalents, and investments. The Company places its cash primarily with domestic financial institutions that are federally insured within statutory limits, but at times its deposits may exceed federally insured limits.

Concentration of Supply Risk

The Company is dependent on its suppliers, the majority of which are single-source suppliers, and the inability of these suppliers to deliver necessary components of its products according to the schedule and at prices, quality levels and volumes acceptable to the Company, or its inability to efficiently manage these components, could have a material adverse effect on the Company’s results of operations and financial condition.

Investments

Investments The Company’s investments in marketable debt securities have been classified and accounted for as available-for-sale and they are stated at fair value. The Company classifies its investments as either short-term or long-term based on each instrument’s underlying contractual maturity date. Unrealized gains and losses on our investments of available-for-sale securities are recorded in accumulated other comprehensive loss which is included within stockholders’ equity. Interest, as well as amortization and accretion of purchase premiums and discounts on our investments of available-for-sale securities are included in Interest income. The cost of securities sold is determined using the specific identification method. Realized gains and losses on the sale of available-for-sale securities are recorded in other income (expense), net.

Vehicle Sales with Residual Value Guarantee

The Company provides an RVG to its commercial banking partner in connection with its vehicle leasing program. Under the vehicle leasing program, the Company generally receives full payment for the vehicle sales price at the time of delivery, does not bear casualty and credit risks during the lease term, and is contractually obligated (or entitled) to share a portion of the shortfall (or excess) between the resale value realized by the commercial banking partner and a predetermined resale value. During the three and nine months ended September 30, 2022, vehicle sales with RVG totaled $10.1 million. At the lease inception, the Company is required to deposit cash collateral equal to a contractual percentage of the residual value of the leased vehicles with the commercial banking partner. The cash collateral is held in a restricted bank account owned by the commercial banking partner until it is used, as applicable, in settlement of the RVG at the end of the lease term. Cash collateral is recorded in other long-term assets, subject to asset impairment review at each reporting period.

The Company accounts for the vehicle leasing program in accordance with ASC 842, Leases, ASC 460, Guarantees and ASC 606, Revenue from Contracts with Customers. The Company is the lessor at inception of a lease and immediately transfers the lease as well as the underlying vehicle to its commercial banking partner, with the transaction being accounted for as a sale under ASC 606. The Company recognizes revenue when control transfers upon delivery when the consumer-lessee takes physical possession of the vehicle, and bifurcates the RVG at fair value and accounts for it as a guarantee liability. The remaining amount of the transaction price is allocated among the performance obligations, including the vehicle, the unspecified over-the-air (“OTA”) software updates and remarketing activities, in proportion to the standalone selling price of the Company’s performance obligations.

The guarantee liability represents the estimated amount the Company expects to pay at the end of the lease term. The Company is released from residual risk upon either expiration or settlement of the RVG. The Company evaluates variables such as third-party residual value publications, risk of future price deterioration due to changes in market conditions and reconditioning costs to determine the estimated residual value guarantee liability. As we accumulate more data related to the resale value of our vehicles or as market conditions change, there could be material changes to the estimated guarantee liabilities. As of September 30, 2022, the RVG liability was immaterial.

Government Grants

Government GrantsGovernment grants are recognized when the grants are received, and all the conditions specified in the grant have been met. Grants related to fixed assets are recorded as a deduction in calculating the carrying amount of the related assets and are recognized in profit or loss over the life of a depreciable asset through reduced depreciation expense. Grants received in advance of the acquisition or construction of assets are recorded initially in deferred liability and then as a deduction in calculating the carrying amount of the related fixed assets upon acquisition or construction of the assets. Grant receipts are classified as investing cash inflows on a gross basis on the condensed consolidated statements of cash flows.

Recently Adopted Accounting Pronouncements

In November 2021, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, which requires annual disclosures about transactions with a government that are accounted for by applying a grant or contribution accounting model by analogy. The disclosure requirements include information about the nature of the transactions and the related accounting policy, the line items on the balance sheet and income statement that are affected by the transactions, the amount applicable to each financial statement line and significant terms and conditions of the transactions. The guidance is effective for annual periods beginning after December 15, 2021 and can be applied either prospectively or retrospectively. The Company adopted ASU 2021-10 prospectively on January 1, 2022. The adoption of this ASU did not have an impact to the condensed consolidated financial statements and related disclosures.

Fair Value Measurement

The accounting standard for fair value measurements provides a framework for measuring fair value and requires expanded disclosures regarding fair value measurements. Fair value is defined as the price that would be received for an asset or the “exit price” that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between independent market participants on the measurement date. The Company measures financial assets and liabilities at fair value at each reporting period using a fair value hierarchy, which requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. This hierarchy prioritizes the inputs into three broad levels as follows:

•Level 1—Quoted prices (unadjusted) in active markets for identical assets or liabilities.

•Level 2—Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

•Level 3—Inputs that are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. Factors used to develop the estimated fair value are unobservable inputs that are not supported by market activity. The sensitivity of the fair value measurement to changes in unobservable inputs may result in a significantly higher or lower measurement.