Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying (i) unaudited consolidated balance sheet as of December 31, 2021, which has been derived from audited financial statements, and (ii) unaudited interim condensed financial statements have been prepared in accordance pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Therefore, it is suggested that these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes in the 2021 Form 10-K, filed with the SEC on March 31, 2022. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, cash flows, and stockholders’ equity for the interim periods, but are not necessarily indicative of the results to be anticipated for the full year 2022 or any future period. In accordance with Accounting Standards Codification ("ASC") 205-40, Presentation of Financial Statements - Going Concern, the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about its ability to continue as a going concern within one year after the consolidated financial statements are issued. Since inception, the Company has incurred recurring losses and negative cash flows from operations and has an accumulated deficit of $115.8 million as of September 30, 2022. Nuvve incurred net losses of approximately $70.8 million as of the nine months ended September 30, 2022, and $27.2 million and $4.9 million for the years ended December 31, 2021, and 2020, respectively. Nuvve cash used in operations were $28.2 million as of the nine months ended September 30, 2022, and $29.2 million and $3.1 million for the years ended December 31, 2021, and 2020, respectively. As of September 30, 2022, Nuvve had a cash balance, working capital, and stockholders’ equity of $21.6 million, $31.0 million and $30.8 million, respectively. The Company continues to expect to generate operating losses and negative cash flows and may need additional funding to support its planned operating activities through profitability. The transition to profitability is dependent upon the successful expanded commercialization of the Company's Grid Integrated Vehicle ("GIVe") platform and the achievement of a level of revenues adequate to support its cost structure. On May 5, 2022, the Company entered into an at-the-market offering agreement in which the Company from time to time during the term of the sales agreement, offers and sells shares of its common stock having an aggregate offering price up to a total of $25.0 million in gross proceeds. Shares of common stock sold under the sales agreement are offered and sold pursuant to the Company's shelf registration statement. During the nine months ended September 30, 2022, the Company sold 792,882 shares of common stock pursuant to the sales agreement at an average price of $4.97 per share for aggregate proceeds of approximately $3.8 million, net of offering costs. In July 2022, the Company completed a registered direct offering of its common stock. See Note 11 for details. The aggregate gross proceeds to the Company from the offering were approximately $14.0 million and net proceeds were $13.1 million. The Company expects its cash and cash equivalents as of November 14, 2022 will be sufficient to fund current planned operations for at least the next twelve months from the date of issuance of these unaudited condensed consolidated financial statements. Management's expectations with respect to its ability to fund current planned operations is based on estimates that are subject to risks and uncertainties. There is an inherent risk that the Company may not achieve such financial projections and if so, cash outflows could be higher than currently anticipated. Should this occur, management believes that there are various cash saving measures that could be quickly implemented during this time period, including reductions in discretionary expenses related to consultants, travel, personnel and personnel related costs. If necessary, management believes it can raise additional financing through its at-the-market agreement. Although these measures are not expected to be used, and such actions could potentially harm the business, management believes that if necessary, the cash savings from these actions would allow the Company to continue as a going concern through November 14, 2023.
Principles of Consolidation	Principles of ConsolidationThe condensed consolidated financial statements include the accounts and operations of the Company, its wholly owned subsidiaries and its consolidated variable interest entity. All intercompany accounts and transactions have been eliminated upon consolidation.
Variable Interest Entities	Variable Interest Entities Pursuant to the consolidation guidance, the Company first evaluates whether it holds a variable interest in an entity in which it has a financial relationship and, if so, whether or not that entity is a variable interest entity ("VIE"). A VIE is an entity with insufficient equity at risk for the entity to finance its activities without additional subordinated financial support or in which equity investors lack the characteristics of a controlling financial interest. If an entity is determined to be a VIE, the Company evaluates whether the Company is the primary beneficiary. The primary beneficiary analysis is a qualitative analysis based on power and economics. The Company concludes that it is the primary beneficiary and consolidates the VIE if the Company has both (i) the power to direct the activities of the VIE that most significantly influence the VIE's economic performance, and (ii) the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. The Company formed Levo with Stonepeak and Evolve, in which the Company owns 51% of Levo's common units. The Company has determined that Levo is a VIE in which the Company is the primary beneficiary. Accordingly, the Company consolidates Levo and records a non-controlling interest for the share of the entity owned by Stonepeak and Evolve. Assets and Liabilities of Consolidated VIEs The Company's condensed consolidated financial statements include the assets, liabilities and results of operations of VIEs for which the Company is the primary beneficiary. The other equity holders’ interests are reflected in "Net loss attributable to non-controlling interests" in the condensed consolidated statements of operations and "Non-controlling interests" in the condensed consolidated balance sheets. See Note 18 for details of non-controlling interests. The Company began consolidating the assets, liabilities and results of operations of Levo during the quarter ended September 30, 2021.
Noncontrolling Interest	Redeemable Non-Controlling Interest - Mezzanine Equity Redeemable non-controlling interest represents the shares of the preferred stock issued by Levo to Stonepeak and Evolve (the "preferred shareholders"), who own 49% of Levo common units. The preferred stock is not mandatorily redeemable or currently redeemable, but it could be redeemable with the passage of time at the election of Levo, the preferred shareholders or a trigger event as defined in the preferred stock agreement. As a result of the contingent put right available to the preferred shareholders, the redeemable non-controlling interests in Levo are classified as mezzanine equity in the Company’s unaudited condensed consolidated balance sheets as mezzanine equity. The initial carrying value of the redeemable non-controlling interest is reported at the initial proceeds received on issuance date, reduced by the fair value of embedded derivatives resulting in an adjusted initial carrying value. The adjusted initial carrying value is further adjusted for the accretion of the difference with the redemption price value using the effective interest method. The accretion amount is a deemed dividend recorded against retained earnings or, in its absence, to additional-paid-in-capital. The carrying amount of the redeemable non-controlling interest is measured at the higher of the carrying amount adjusted each reporting period for income (or loss) attributable to the non-controlling interest, or the carrying amount adjusted each reporting period by the accretion amount. See Note 18 for details. Non-controlling interests The Company presents non-controlling interests as a component of equity on its condensed consolidated balance sheets and reports the portion of its earnings or loss for non-controlling interest as net earnings or loss attributable to non-controlling interests in the condensed consolidated statements of operations. For entities that are consolidated, but not 100% owned, a portion of the net income or loss and corresponding equity is allocated to owners other than the Company. The aggregate of the net income or loss and corresponding equity that is not owned by the Company is included in non-controlling interests in the condensed consolidated financial statements. Non-controlling interests are presented outside as a separate component of stockholders’ equity on the Company’s condensed consolidated balance sheets. The primary components of non-controlling interests are separately presented in the Company’s condensed consolidated statements of changes in stockholders’ equity to clearly distinguish the interest in the Company and other ownership interests in the consolidated entities. Net income or loss includes the net income or loss attributable to the holders of non-controlling interests on the Company’s condensed consolidated statements of operations. Net income or loss is allocated to non-controlling interests in proportion to their relative ownership interests.
Emerging Growth Company	Emerging Growth CompanySection 102(b)(1) of the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”) permits emerging growth companies (“EGC”) to delay complying with new or revised financial accounting standards that do not yet apply to private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act). The Company qualifies as an EGC. The JOBS Act provides that an EGC can elect to opt-out of the extended transition period and comply with the requirements that apply to non-EGCs, but any such election to opt-out is irrevocable. The Company has elected not to opt-out of such an extended transition period, which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an EGC, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This different adoption timing may make a comparison of the Company’s financial statements with another public company, which is neither an EGC nor an EGC that has opted out of using the extended transition period, difficult or impossible because of the potential differences in accounting standards used.
COVID-19	COVID-19 The novel coronavirus (COVID-19) which was declared a pandemic in March 2020, and the related restrictive measures such as travel restrictions, quarantines, and shutdowns, has negatively impacted the global economy. As national and local governments in different countries ease COVID-19 restrictions, and vaccines are distributed and rolled out successfully, we continue to see improved economic trends. However, COVID-19 and actions taken to mitigate its spread have had, and are expected to continue to have an adverse impact on the economies and financial markets of many countries, including the geographical area in which the Company operates. The Company continues to monitor the situation closely but, at this time, is unable to predict the cumulative impact, both in terms of severity and duration, that the coronavirus pandemic has and will have on its business, operating results, cash flows and financial condition, and it could be material if the current circumstances continue to exist for a prolonged period of time. In addition to any direct impact on Nuvve’s business, it is reasonably possible that the estimates made by management in preparing Nuvve’s financial statements have been, or will be, materially and adversely impacted in the near term as a result of the on-going COVID-19 conditions.
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 may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Significant estimates and assumptions made by management include the impairment of intangible assets, the net realizable value of inventory, the fair value of share-based payments, lease incremental borrowing rate, derivative liability associated with redeemable preferred shares, revenue recognition, the fair value of warrants, and the recognition and disclosure of contingent liabilities. Management evaluates its estimates on an ongoing basis. Actual results could materially vary from those estimates.
Cash and Restricted Cash	Cash and Restricted Cash The Company maintains cash balances that can, at times, exceed amounts insured by the Federal Deposit Insurance Corporation, which is up to $250,000. The Company has not experienced any losses in these accounts and believes it is not exposed to any significant credit risk in this area. In connection with a new office lease agreement, the Company was required to provide an irrevocable, unconditional letter of credit to the landlord upon execution of the lease. The amount securing the letter of credit was recorded as restricted cash as of September 30, 2022 and December 31, 2021.
Concentrations of Credit Risk	Concentrations of Credit Risk At September 30, 2022 and December 31, 2021, the financial instruments which potentially expose the Company to concentration of credit risk consist of cash in financial institutions (in excess of federally insured limits) and trade receivables. The Company had certain customers whose revenue individually represented 10% or more of the Company’s total revenue, or whose accounts receivable balances individually represented 10% or more of the Company’s total accounts receivable, as follows: For the three and nine months ended September 30, 2022 two customers accounted for 62.4% and 51.1% of revenue, respectively. For the three and nine months ended September 30, 2021 four and three customers in aggregate accounted for 74.4% and 43.5% of revenue, respectively. During the three and nine months ended September 30, 2022, the Company's top five customers accounted for approximately 81.9% and 63.7%, respectively, of the Company’s total revenue. During the three and nine months ended September 30, 2021, the Company's top five customers accounted for approximately 79.7% and 59.4%, respectively, of the Company’s total revenue. At September 30, 2022, four customers in aggregate accounted for 53.6% of accounts receivable. At December 31, 2021, two customers in aggregate accounted for 32.2% of accounts receivable. Approximately 61.5% and 56.0% of the Company’s trade accounts receivable balance was with five customers at September 30, 2022 and December 31, 2021, respectively. The Company estimates its maximum credit risk for accounts receivable at the amount recorded on the balance sheet. The trade accounts receivables are generally short-term and all probable bad debt losses have been appropriately considered in establishing the allowance for doubtful accounts.
Revenue Recognition	Revenue Recognition Bill-and-hold arrangements - The Company occasionally enters into bill and hold arrangements in which some customers request that billed products that are ready for delivery be held at the Company's warehouse facility for them until shipment at a later date. In this instance, revenue is recognized when; 1) the risks of ownership, including title, have passed to the customer, 2) the product must be identified separately as belonging to the customer, 3) the product currently must be ready for physical transfer to the customer, and 4) the Company does not have the ability to use the product or to direct it to another customer.
Deferred Financing Costs	Deferred Financing Costs Deferred financing costs consist of direct and incremental costs incurred and fees paid for a commitment to obtain financing. As the commitment amount is funded, the carrying amount of the deferred financing costs is reduced and the amount is charged to additional-paid-in-capital. The deferred financing cost will be impaired if it becomes probable that funding of the commitment amount will not occur. The Company recorded an impairment charge of $43.6 million during the nine months ended September 30, 2022. The impairment charge was driven by a write-off of deferred financing costs associated with the carrying value of warrants and stock options granted to Stonepeak and Evolve in May 2021 in return for their capital commitment to fund up to $750 million in V2G enabled EV fleet deployments of school buses through Levo. The Company impaired the deferred financing costs during the nine months ended September 30, 2022 primarily because it has not entered into fleet-as-a-service customer contracts requiring preferred capital commitments from Stonepeak and Levo in excess of $43.6 million within one year of the deferred financing costs being capitalized. The impairment charge is non-cash and does not impact the existing capital commitment we have from Stonepeak and Evolve or the pursuit of customer deployments funded by this capital commitment. Note 19 of the Company's 2021 Form 10-K further describes the terms of the capital commitment with Stonepeak and Evolve.
Investments in Equity Securities Without Readily Determinable Fair Values	Investments in Equity Securities Without Readily Determinable Fair Values Investments in equity securities of nonpublic entities without readily determinable fair values are carried at 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. The Company reviews its equity securities without readily determinable fair values on a regular basis to determine if the investment is impaired. For purposes of this assessment, the Company considers the investee’s cash position, earnings and revenue outlook, liquidity, and management ownership, among other factors, in its review. If management’s assessment indicates that an impairment exists, the Company estimates the fair value of the equity investment and recognizes in current earnings an impairment loss that is equal to the difference between the fair value of the equity investment and its carrying amount. In June 2022, the Company invested $1.0 million in Switch EV Ltd ("Switch"), a nonpublic entity incorporated and registered in the United Kingdom through an advance subscription agreement for a future equity ownership. Since Switch is a nonpublic entity, there is no readily determinable fair value. As of September 30, 2022, the Company’s investment in Switch was accounted for as an investment in equity securities without a readily determinable fair value subject to impairment. The Company did not recognize an impairment loss on its investment during the quarter ended September 30, 2022.
Recently adopted accounting pronouncements
Recently issued accounting pronouncements not yet adopted	Recently issued accounting pronouncements not yet adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 requires, among other things, the use of a new current expected credit loss ("CECL") model in determining the allowances for doubtful accounts with respect to accounts receivable, accrued straight-line rents receivable, and notes receivable. The CECL model requires that an entity estimate its lifetime expected credit loss with respect to these receivables and record allowances that, when deducted from the balance of the receivables, represent the net amounts expected to be collected. Entities will also be required to disclose information about how the entity developed the allowances, including changes in the factors that influenced its estimate of expected credit losses and the reasons for those changes. This update is effective for fiscal years beginning after December 15, 2022, with early adoption permitted. The Company is currently evaluating the impact of the new guidance on its consolidated financial statements.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2022

The accompanying (i) unaudited consolidated balance sheet as of December 31, 2021, which has been derived from audited financial statements, and (ii) unaudited interim condensed financial statements have been prepared in accordance pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Therefore, it is suggested that these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes in the 2021 Form 10-K, filed with the SEC on March 31, 2022.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss, cash flows, and stockholders’ equity for the interim periods, but are not necessarily indicative of the results to be anticipated for the full year 2022 or any future period.

In accordance with Accounting Standards Codification ("ASC") 205-40, Presentation of Financial Statements - Going Concern, the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about its ability to continue as a going concern within one year after the consolidated financial statements are issued. Since inception, the Company has incurred recurring losses and negative cash flows from operations and has an accumulated deficit of $115.8 million as of September 30, 2022. Nuvve incurred net losses of approximately $70.8 million as of the nine months ended September 30, 2022, and $27.2 million and $4.9 million for the years ended December 31, 2021, and 2020, respectively. Nuvve cash used in operations were $28.2 million as of the nine months ended September 30, 2022, and $29.2 million and $3.1 million for the years ended December 31, 2021, and 2020, respectively. As of September 30, 2022, Nuvve had a cash balance, working capital, and stockholders’ equity of $21.6 million, $31.0 million and $30.8 million, respectively. The Company continues to expect to generate operating losses and negative cash flows and may need additional funding to support its planned operating activities through profitability. The transition to profitability is dependent upon the successful expanded commercialization of the Company's Grid Integrated Vehicle ("GIVe") platform and the achievement of a level of revenues adequate to support its cost structure.

On May 5, 2022, the Company entered into an at-the-market offering agreement in which the Company from time to time during the term of the sales agreement, offers and sells shares of its common stock having an aggregate offering price up to a total of $25.0 million in gross proceeds. Shares of common stock sold under the sales agreement are offered and sold pursuant to the Company's shelf registration statement. During the nine months ended September 30, 2022, the Company sold 792,882 shares of common stock pursuant to the sales agreement at an average price of $4.97 per share for aggregate proceeds of approximately $3.8 million, net of offering costs.

In July 2022, the Company completed a registered direct offering of its common stock. See Note 11 for details. The aggregate gross proceeds to the Company from the offering were approximately $14.0 million and net proceeds were $13.1 million.

The Company expects its cash and cash equivalents as of November 14, 2022 will be sufficient to fund current planned operations for at least the next twelve months from the date of issuance of these unaudited condensed consolidated financial statements. Management's expectations with respect to its ability to fund current planned operations is based on estimates that are subject to risks and uncertainties. There is an inherent risk that the Company may not achieve such financial projections and if so, cash outflows could be higher than currently anticipated. Should this occur, management believes that there are various cash saving measures that could be quickly implemented during this time period, including reductions in discretionary expenses related to consultants, travel, personnel and personnel related costs. If necessary, management believes it can raise additional financing through its at-the-market agreement. Although these measures are not expected to be used, and such actions could potentially harm the business, management believes that if necessary, the cash savings from these actions would allow the Company to continue as a going concern through November 14, 2023.

Principles of Consolidation

Principles of ConsolidationThe condensed consolidated financial statements include the accounts and operations of the Company, its wholly owned subsidiaries and its consolidated variable interest entity. All intercompany accounts and transactions have been eliminated upon consolidation.

Variable Interest Entities

Pursuant to the consolidation guidance, the Company first evaluates whether it holds a variable interest in an entity in which it has a financial relationship and, if so, whether or not that entity is a variable interest entity ("VIE"). A VIE is an entity with insufficient equity at risk for the entity to finance its activities without additional subordinated financial support or in which equity investors lack the characteristics of a controlling financial interest. If an entity is determined to be a VIE, the Company evaluates whether the Company is the primary beneficiary. The primary beneficiary analysis is a qualitative analysis based on power and economics. The Company concludes that it is the primary beneficiary and consolidates the VIE if the Company has both (i) the power to direct the activities of the VIE that most significantly influence the VIE's economic performance, and (ii) the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE.

The Company formed Levo with Stonepeak and Evolve, in which the Company owns 51% of Levo's common units. The Company has determined that Levo is a VIE in which the Company is the primary beneficiary. Accordingly, the Company consolidates Levo and records a non-controlling interest for the share of the entity owned by Stonepeak and Evolve.

Assets and Liabilities of Consolidated VIEs

The Company's condensed consolidated financial statements include the assets, liabilities and results of operations of VIEs for which the Company is the primary beneficiary. The other equity holders’ interests are reflected in "Net loss attributable to non-controlling interests" in the condensed consolidated statements of operations and "Non-controlling interests" in the condensed consolidated balance sheets. See Note 18 for details of non-controlling interests. The Company began consolidating the assets, liabilities and results of operations of Levo during the quarter ended September 30, 2021.

Noncontrolling Interest

Redeemable Non-Controlling Interest - Mezzanine Equity

Redeemable non-controlling interest represents the shares of the preferred stock issued by Levo to Stonepeak and Evolve (the "preferred shareholders"), who own 49% of Levo common units. The preferred stock is not mandatorily redeemable or currently redeemable, but it could be redeemable with the passage of time at the election of Levo, the preferred shareholders or a trigger event as defined in the preferred stock agreement. As a result of the contingent put right available to the preferred shareholders, the redeemable non-controlling interests in Levo are classified as mezzanine equity in the Company’s unaudited condensed consolidated balance sheets as mezzanine equity. The initial carrying value of the redeemable non-controlling interest is reported at the initial proceeds received on issuance date, reduced by the fair value of embedded derivatives resulting in an adjusted initial carrying value. The adjusted initial carrying value is further adjusted for the accretion of the difference with the redemption price value using the effective interest method. The accretion amount is a deemed dividend recorded against retained earnings or, in its absence, to additional-paid-in-capital. The carrying amount of the redeemable non-controlling interest is measured at the higher of the carrying amount adjusted each reporting period for income (or loss)

attributable to the non-controlling interest, or the carrying amount adjusted each reporting period by the accretion amount. See Note 18 for details.

Non-controlling interests

The Company presents non-controlling interests as a component of equity on its condensed consolidated balance sheets and reports the portion of its earnings or loss for non-controlling interest as net earnings or loss attributable to non-controlling interests in the condensed consolidated statements of operations.

For entities that are consolidated, but not 100% owned, a portion of the net income or loss and corresponding equity is allocated to owners other than the Company. The aggregate of the net income or loss and corresponding equity that is not owned by the Company is included in non-controlling interests in the condensed consolidated financial statements.

Non-controlling interests are presented outside as a separate component of stockholders’ equity on the Company’s condensed consolidated balance sheets. The primary components of non-controlling interests are separately presented in the Company’s condensed consolidated statements of changes in stockholders’ equity to clearly distinguish the interest in the Company and other ownership interests in the consolidated entities. Net income or loss includes the net income or loss attributable to the holders of non-controlling interests on the Company’s condensed consolidated statements of operations. Net income or loss is allocated to non-controlling interests in proportion to their relative ownership interests.

Emerging Growth Company

Emerging Growth CompanySection 102(b)(1) of the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”) permits emerging growth companies (“EGC”) to delay complying with new or revised financial accounting standards that do not yet apply to private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act). The Company qualifies as an EGC. The JOBS Act provides that an EGC can elect to opt-out of the extended transition period and comply with the requirements that apply to non-EGCs, but any such election to opt-out is irrevocable. The Company has elected not to opt-out of such an extended transition period, which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an EGC, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This different adoption timing may make a comparison of the Company’s financial statements with another public company, which is neither an EGC nor an EGC that has opted out of using the extended transition period, difficult or impossible because of the potential differences in accounting standards used.

COVID-19

The novel coronavirus (COVID-19) which was declared a pandemic in March 2020, and the related restrictive measures such as travel restrictions, quarantines, and shutdowns, has negatively impacted the global economy. As national and local governments in different countries ease COVID-19 restrictions, and vaccines are distributed and rolled out successfully, we continue to see improved economic trends. However, COVID-19 and actions taken to mitigate its spread have had, and are expected to continue to have an adverse impact on the economies and financial markets of many countries, including the geographical area in which the Company operates. The Company continues to monitor the situation closely but, at this time, is unable to predict the cumulative impact, both in terms of severity and duration, that the coronavirus pandemic has and will have on its business, operating results, cash flows and financial condition, and it could be material if the current circumstances continue to exist for a prolonged period of time. In addition to any direct impact on Nuvve’s business, it is reasonably possible that the estimates made by management in preparing Nuvve’s financial statements have been, or will be, materially and adversely impacted in the near term as a result of the on-going COVID-19 conditions.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Significant estimates and assumptions made by management include the impairment of intangible assets, the net realizable value of inventory, the fair value of share-based payments, lease incremental borrowing rate, derivative liability associated with redeemable preferred shares, revenue recognition, the fair value of warrants, and the recognition and disclosure of contingent liabilities.

Management evaluates its estimates on an ongoing basis. Actual results could materially vary from those estimates.

Cash and Restricted Cash

The Company maintains cash balances that can, at times, exceed amounts insured by the Federal Deposit Insurance Corporation, which is up to $250,000. The Company has not experienced any losses in these accounts and believes it is not exposed to any significant credit risk in this area. In connection with a new office lease agreement, the Company was required to provide an irrevocable, unconditional letter of credit to the landlord upon execution of the lease. The amount securing the letter of credit was recorded as restricted cash as of September 30, 2022 and December 31, 2021.

Concentrations of Credit Risk

At September 30, 2022 and December 31, 2021, the financial instruments which potentially expose the Company to concentration of credit risk consist of cash in financial institutions (in excess of federally insured limits) and trade receivables.

The Company had certain customers whose revenue individually represented 10% or more of the Company’s total revenue, or whose accounts receivable balances individually represented 10% or more of the Company’s total accounts receivable, as follows:

For the three and nine months ended September 30, 2022 two customers accounted for 62.4% and 51.1% of revenue, respectively. For the three and nine months ended September 30, 2021 four and three customers in aggregate accounted for 74.4% and 43.5% of revenue, respectively.

During the three and nine months ended September 30, 2022, the Company's top five customers accounted for approximately 81.9% and 63.7%, respectively, of the Company’s total revenue. During the three and nine months ended September 30, 2021, the Company's top five customers accounted for approximately 79.7% and 59.4%, respectively, of the Company’s total revenue.

At September 30, 2022, four customers in aggregate accounted for 53.6% of accounts receivable. At December 31, 2021, two customers in aggregate accounted for 32.2% of accounts receivable.

Approximately 61.5% and 56.0% of the Company’s trade accounts receivable balance was with five customers at September 30, 2022 and December 31, 2021, respectively. The Company estimates its maximum credit risk for accounts receivable at the amount recorded on the balance sheet. The trade accounts receivables are generally short-term and all probable bad debt losses have been appropriately considered in establishing the allowance for doubtful accounts.

Revenue Recognition

Bill-and-hold arrangements - The Company occasionally enters into bill and hold arrangements in which some customers request that billed products that are ready for delivery be held at the Company's warehouse facility for them until shipment at a later date. In this instance, revenue is recognized when; 1) the risks of ownership, including title, have passed to the customer, 2) the product must be identified separately as belonging to the customer, 3) the product currently must be ready for physical transfer to the customer, and 4) the Company does not have the ability to use the product or to direct it to another customer.

Deferred Financing Costs

Deferred financing costs consist of direct and incremental costs incurred and fees paid for a commitment to obtain financing. As the commitment amount is funded, the carrying amount of the deferred financing costs is reduced and the amount is charged to additional-paid-in-capital. The deferred financing cost will be impaired if it becomes probable that funding of the commitment amount will not occur.

The Company recorded an impairment charge of $43.6 million during the nine months ended September 30, 2022. The impairment charge was driven by a write-off of deferred financing costs associated with the carrying value of warrants and stock options granted to Stonepeak and Evolve in May 2021 in return for their capital commitment to fund up to $750 million in V2G enabled EV fleet deployments of school buses through Levo. The Company impaired the deferred financing costs during the nine months ended September 30, 2022 primarily because it has not entered into fleet-as-a-service customer contracts requiring preferred capital commitments from Stonepeak and Levo in excess of $43.6 million within one year of the deferred financing costs being capitalized. The impairment charge is non-cash and does not impact the existing capital commitment we have from Stonepeak and Evolve or the pursuit of customer deployments funded by this capital commitment. Note 19 of the Company's 2021 Form 10-K further describes the terms of the capital commitment with Stonepeak and Evolve.

Investments in Equity Securities Without Readily Determinable Fair Values

Investments in equity securities of nonpublic entities without readily determinable fair values are carried at 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. The Company reviews its equity securities without readily determinable fair values on a regular basis to determine if the investment is impaired. For purposes of this assessment, the Company considers the investee’s cash position, earnings and revenue outlook, liquidity, and management ownership, among other factors, in its review. If management’s assessment indicates that an impairment exists, the Company estimates the fair value of the equity investment and recognizes in current earnings an impairment loss that is equal to the difference between the fair value of the equity investment and its carrying amount.

In June 2022, the Company invested $1.0 million in Switch EV Ltd ("Switch"), a nonpublic entity incorporated and registered in the United Kingdom through an advance subscription agreement for a future equity ownership. Since Switch is a nonpublic entity, there is no readily determinable fair value. As of September 30, 2022, the Company’s investment in Switch was accounted for as an investment in equity securities without a readily determinable fair value subject to impairment. The Company did not recognize an impairment loss on its investment during the quarter ended September 30, 2022.

Recently adopted accounting pronouncements

Recently issued accounting pronouncements not yet adopted

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 requires, among other things, the use of a new current expected credit loss ("CECL") model in determining the allowances for doubtful accounts with respect to accounts receivable, accrued straight-line rents receivable, and notes receivable. The CECL model requires that an entity estimate its lifetime expected credit loss with respect to these receivables and record allowances that, when deducted from the balance of the receivables, represent the net amounts expected to be collected. Entities will also be required to disclose information about how the entity developed the allowances, including changes in the factors that influenced its estimate of expected credit losses and the reasons for those changes. This update is effective for fiscal years beginning after December 15, 2022, with early adoption permitted. The Company is currently evaluating the impact of the new guidance on its consolidated financial statements.