Organization and Business Operations	6 Months Ended
Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business Operations	1. Organization and Business Operations *Incorporation* Dune Acquisition Corporation (the “Company”) was incorporated as a Delaware corporation on June 18, 2020. *Sponsor* The Company’s sponsor is Dune Acquisition Holdings LLC, a Delaware limited liability company (the “Sponsor”). *Business Purpose* The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or other similar business combination with one or more businesses (“Business Combination”). The Company is an emerging growth company and, as such, the Company is subject to all of the risks associated with emerging growth companies. As of June 30, 2021, the Company had not commenced any operations. All activity for the period from June 18, 2020 (inception) through June 30, 2021 relates to the Company’s formation and the initial public offering (the “Public Offering”), described below, and since the closing of the Public Offering, the search for a prospective initial Business Combination. The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company will generate non-operating income in the form of interest income on investments held in the Trust Account. The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Public Offering, although substantially all of the net proceeds of the Public Offering are intended to be generally applied toward completing a Business Combination. Furthermore, there is no assurance that the Company will be able to successfully complete a Business Combination. *Financing* The registration statement for the Company’s Public Offering was declared effective on December 17, 2020 by the U.S. Securities and Exchange Commission (“SEC”). On December 22, 2020, the Company consummated its Public Offering of 17,250,000 units, including the issuance of 2,250,000 units as a result of the underwriters’ exercise of their over-allotment option in full (the “Units”) at $10.00 per Unit, generating gross proceeds of $172,500,000. Simultaneously with the closing of the Public Offering, the Company consummated the private placement (“Private Placement”) of 4,850,000 warrants (each, a “Private Placement Warrant” and collectively, the “Private Placement Warrants”) at a price of $1.00 per Private Placement Warrant to the Sponsor, generating proceeds of $4,850,000. Upon the closing of the Public Offering and the Private Placement, $172,500,000 of the net proceeds of the Public Offering and certain of the proceeds of the Private Placement was placed in a U.S.-based trust account maintained by Continental Stock Transfer & Trust Company, acting as trustee (the “Trust Account”). *Trust Account* The proceeds held in the Trust Account were invested in permitted United States “government securities” within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended (the “Investment Company Act”) having a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 promulgated under the Investment Company Act which invest only in direct U.S. government treasury obligations, as determined by the Company, until the earlier of: (i) the completion of a Business Combination and (ii) the distribution of the Trust Account as described below. The Company’s amended and restated certificate of incorporation (the “Charter”) provides that, other than the withdrawal of interest earned on the funds that may be released to the Company to pay taxes, none of the funds held in the Trust Account will be released until the earlier of: (i) the completion of the Business Combination; (ii) the redemption of any of the shares of Class A common stock, par value $0.0001 per share (the “Class A Common Stock”) included in the Units sold in the Public Offering properly submitted in connection with a stockholder vote to amend the Charter to modify the substance or timing of the Company’s obligation to redeem 100% of the common stock included in the Units being sold in the Public Offering if the Company does not complete the Business Combination within 18 months from the closing of the Public Offering or with respect to any other material provisions relating to stockholders’ rights or pre-initial Business Combination activity or (iii) the redemption of 100% of the shares of Class A Common Stock included in the Units sold in the Public Offering if the Company is unable to complete a Business Combination within 18 months from the closing of the Public Offering. The Company, after signing a definitive agreement for a Business Combination, will either (i) seek stockholder approval of the Business Combination at a meeting called for such purpose in connection with which stockholders may seek to redeem their shares, regardless of whether they vote for or against the Business Combination, for cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the Business Combination, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay taxes, or (ii) provide stockholders with the opportunity to sell their shares to the Company by means of a tender offer for an amount in cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to commencement of the tender offer, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay taxes. However, in no event will the Company redeem its public shares in an amount that would cause its net tangible assets to be less than $5,000,001. In such case, the Company would not proceed with the redemption of its public shares and the related Business Combination, and instead may search for an alternate Business Combination. If the Company holds a stockholder vote in connection with a Business Combination, a public stockholder will have the right to redeem its shares for an amount in cash equal to its pro rata share of the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the Business Combination, including interest earned on the funds held in the Trust Account but not previously released to the Company to pay taxes. As a result, such common stock will be recorded at redemption amount and classified as temporary equity upon the completion of the Public Offering, in accordance with Financial Accounting Standards Board Accounting Standard Codification “FASB”, ASC 480, “Distinguishing Liabilities from Equity”. The Company has 18 months from the closing of the Public Offering to complete its Business Combination (or until June 22, 2022). If the Company does not complete a Business Combination within this period of time, it will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but no more than ten business days thereafter, redeem the public shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the trust account, including interest earned on the funds held in the trust account and not previously released to us to pay our taxes (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding public shares, which redemption will completely extinguish public stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), and (iii) as promptly as reasonably possible following such redemption, subject to the approval of our remaining stockholders and our board of directors, liquidate and dissolve, subject in each case to our obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. The Sponsor and the Company’s executive officers and independent directors (the “initial stockholders”) entered into a letter agreement with the Company, pursuant to which they waived their rights to participate in any redemption with respect to their Founder Shares (as defined below); however, if the initial stockholders or any of the Company’s officers, directors or affiliates acquire shares of Class A Common Stock, they will be entitled to a pro rata share of the Trust Account upon the Company’s redemption or liquidation in the event the Company does not complete a Business Combination within the required time period. In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including Trust Account assets) will be less than the initial public offering price per Unit in the Public Offering. *Liquidity and Going Concern* As of June 30, 2021, the Company had approximately $326,000 in cash in its operating account and working capital of approximately $358,000 (excluding tax obligations of approximately $56,000 that may be paid using investment income earned in the Trust Account). The Company’s liquidity needs prior to the consummation of the Initial Public Offering were satisfied through the payment of $25,000 from the Sponsor to purchase Founders Shares (as defined in Note 4), and loan proceeds from the Sponsor of approximately $31,000 under the Note (Note 4). The Company repaid the loan in full on December 22, 2020. Subsequent from the consummation of the Initial Public Offering, the Company’s liquidity needs have been satisfied through the net proceeds from the consummation of the Initial Public Offering and the Private Placement held outside of the Trust Account. Based on the foregoing, management believes that the Company will have sufficient working capital and borrowing capacity to meet its needs through the earlier of the consummation of a Business Combination or one year from this filing. Over this time period, the Company will be using the funds held outside of the Trust Account for paying existing accounts payable, identifying and evaluating prospective initial Business Combination candidates, performing due diligence on prospective target businesses, paying for travel expenditures, selecting the target business to merge with or acquire, and structuring, negotiating and consummating the Business Combination.

Organization and Business Operations

6 Months Ended

Jun. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Business Operations

1. Organization and Business Operations

Incorporation

Dune Acquisition Corporation (the “Company”) was incorporated as a Delaware corporation on June 18, 2020.

Sponsor

The Company’s sponsor is Dune Acquisition Holdings LLC, a Delaware limited liability company (the “Sponsor”).

Business Purpose

The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or other similar business combination with one or more businesses (“Business Combination”). The Company is an emerging growth company and, as such, the Company is subject to all of the risks associated with emerging growth companies.

As of June 30, 2021, the Company had not commenced any operations. All activity for the period from June 18, 2020 (inception) through June 30, 2021 relates to the Company’s formation and the initial public offering (the “Public Offering”), described below, and since the closing of the Public Offering, the search for a prospective initial Business Combination. The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company will generate non-operating income in the form of interest income on investments held in the Trust Account.

The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Public Offering, although substantially all of the net proceeds of the Public Offering are intended to be generally applied toward completing a Business Combination. Furthermore, there is no assurance that the Company will be able to successfully complete a Business Combination.

Financing

The registration statement for the Company’s Public Offering was declared effective on December 17, 2020 by the U.S. Securities and Exchange Commission (“SEC”). On December 22, 2020, the Company consummated its Public Offering of 17,250,000 units, including the issuance of 2,250,000 units as a result of the underwriters’ exercise of their over-allotment option in full (the “Units”) at $10.00 per Unit, generating gross proceeds of $172,500,000. Simultaneously with the closing of the Public Offering, the Company consummated the private placement (“Private Placement”) of 4,850,000 warrants (each, a “Private Placement Warrant” and collectively, the “Private Placement Warrants”) at a price of $1.00 per Private Placement Warrant to the Sponsor, generating proceeds of $4,850,000. Upon the closing of the Public Offering and the Private Placement, $172,500,000 of the net proceeds of the Public Offering and certain of the proceeds of the Private Placement was placed in a U.S.-based trust account maintained by Continental Stock Transfer & Trust Company, acting as trustee (the “Trust Account”).

Trust Account

The proceeds held in the Trust Account were invested in permitted United States “government securities” within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended (the “Investment Company Act”) having a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 promulgated under the Investment Company Act which invest only in direct U.S. government treasury obligations, as determined by the Company, until the earlier of: (i) the completion of a Business Combination and (ii) the distribution of the Trust Account as described below.

The Company’s amended and restated certificate of incorporation (the “Charter”) provides that, other than the withdrawal of interest earned on the funds that may be released to the Company to pay taxes, none of the funds held in the Trust Account will be released until the earlier of: (i) the completion of the Business Combination; (ii) the redemption of any of the shares of Class A common stock, par value $0.0001 per share (the “Class A Common Stock”) included in the Units sold in the Public Offering properly submitted in connection with a stockholder vote to amend the Charter to modify the substance or timing of the Company’s obligation to redeem 100% of the common stock included in the Units being sold in the Public Offering if the Company does not complete the Business Combination within 18 months from the closing of the Public Offering or with respect to any other material provisions relating to stockholders’ rights or pre-initial Business Combination activity or (iii) the redemption of 100% of the shares of Class A Common Stock included in the Units sold in the Public Offering if the Company is unable to complete a Business Combination within 18 months from the closing of the Public Offering.

The Company, after signing a definitive agreement for a Business Combination, will either (i) seek stockholder approval of the Business Combination at a meeting called for such purpose in connection with which stockholders may seek to redeem their shares, regardless of whether they vote for or against the Business Combination, for cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the Business Combination, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay taxes, or (ii) provide stockholders with the opportunity to sell their shares to the Company by means of a tender offer for an amount in cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to commencement of the tender offer, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay taxes. However, in no event will the Company redeem its public shares in an amount that would cause its net tangible assets to be less than $5,000,001. In such case, the Company would not proceed with the redemption of its public shares and the related Business Combination, and instead may search for an alternate Business Combination.

If the Company holds a stockholder vote in connection with a Business Combination, a public stockholder will have the right to redeem its shares for an amount in cash equal to its pro rata share of the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the Business Combination, including interest earned on the funds held in the Trust Account but not previously released to the Company to pay taxes. As a result, such common stock will be recorded at redemption amount and classified as temporary equity upon the completion of the Public Offering, in accordance with Financial Accounting Standards Board Accounting Standard Codification “FASB”, ASC 480, “Distinguishing Liabilities from Equity”.

The Company has 18 months from the closing of the Public Offering to complete its Business Combination (or until June 22, 2022). If the Company does not complete a Business Combination within this period of time, it will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but no more than ten business days thereafter, redeem the public shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the trust account, including interest earned on the funds held in the trust account and not previously released to us to pay our taxes (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding public shares, which redemption will completely extinguish public stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), and (iii) as promptly as reasonably possible following such redemption, subject to the approval of our remaining stockholders and our board of directors, liquidate and dissolve, subject in each case to our obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. The Sponsor and the Company’s executive officers and independent directors (the “initial stockholders”) entered into a letter agreement with the Company, pursuant to which they waived their rights to participate in any redemption with respect to their Founder Shares (as defined below); however, if the initial stockholders or any of the Company’s officers, directors or affiliates acquire shares of Class A Common Stock, they will be entitled to a pro rata share of the Trust Account upon the Company’s redemption or liquidation in the event the Company does not complete a Business Combination within the required time period. In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including Trust Account assets) will be less than the initial public offering price per Unit in the Public Offering.

Liquidity and Going Concern

As of June 30, 2021, the Company had approximately $326,000 in cash in its operating account and working capital of approximately $358,000 (excluding tax obligations of approximately $56,000 that may be paid using investment income earned in the Trust Account).

The Company’s liquidity needs prior to the consummation of the Initial Public Offering were satisfied through the payment of $25,000 from the Sponsor to purchase Founders Shares (as defined in Note 4), and loan proceeds from the Sponsor of approximately $31,000 under the Note (Note 4). The Company repaid the loan in full on December 22, 2020. Subsequent from the consummation of the Initial Public Offering, the Company’s liquidity needs have been satisfied through the net proceeds from the consummation of the Initial Public Offering and the Private Placement held outside of the Trust Account.

Based on the foregoing, management believes that the Company will have sufficient working capital and borrowing capacity to meet its needs through the earlier of the consummation of a Business Combination or one year from this filing. Over this time period, the Company will be using the funds held outside of the Trust Account for paying existing accounts payable, identifying and evaluating prospective initial Business Combination candidates, performing due diligence on prospective target businesses, paying for travel expenditures, selecting the target business to merge with or acquire, and structuring, negotiating and consummating the Business Combination.