Description of Organization and Business Operations	12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS	NOTE 1. DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS Shelter Acquisition Corporation I (the “Company”) is a blank check company incorporated as a Delaware corporation on December 11, 2020. The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses (“Business Combination”). The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act of 1933, as amended (the “Securities Act”), as modified by the Jumpstart our Business Startups Act of 2012 (the “JOBS Act”) and, as such, the Company is subject to all of the risks associated with early stage and emerging growth companies. The Company’s sponsor is Shelter Sponsor LLC, a Delaware limited liability company (the “Sponsor”). The Company is not limited to a particular industry or sector for purposes of consummating a Business Combination, however, the Company intends to concentrate on identifying businesses that provide technologically innovative solutions to the real estate industry, broadly defined as “PropTech.” As of December 31, 2021, the Company had not commenced any operations. All activity for the period from December 11, 2020 (inception) through December 31, 2021, relates to the Company’s formation and its initial public offering (the “Initial Public Offering”) as described below. The Company will not generate any operating revenues until after the completion of a Business Combination, at the earliest. The Company generates non-operating income in the form of interest income on cash and cash equivalents from the proceeds derived from the Initial Public Offering. The registration statement for the Company’s Initial Public Offering was declared effective on June 29, 2021. On July 2, 2021, the Company consummated its Initial Public Offering of 20,000,000 units (the “Units”). Each Unit consists of one share of Class A common stock, par value $0.0001 per share (“Class A common stock” and shares thereof sold in the Initial Public Offering, “Public Shares”), and one-half of one redeemable warrant of the Company (“Public Warrant”), each whole Public Warrant exercisable into one share of Class A common stock at an exercise price of $11.50 per share. The Units were sold at a price of $10.00 per unit, generating gross proceeds to the Company of $200,000,000, which is discussed in Note 3. Simultaneously with the consummation of the Initial Public Offering and the sale of the Units, the Company consummated the sale of 6,250,000 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, in a private placement (the “Private Placement”) generating gross proceeds of $6,250,000, which is discussed in Note 4. On July 14, 2021, the Company issued an additional 2,164,744 Units in connection with the partial exercise by the underwriters of their over-allotment option, generating gross proceeds of $21,647,440, which is discussed in Note 3. Simultaneously with the closing of the underwriters’ partial exercise of the over-allotment option, the Company sold an additional 432,949 Private Placement Warrants, at a price of $1.00 per Private Placement Warrant, to the Sponsor in a private placement (together with the Private Placement, the “Private Placements”) generating gross proceeds of $432,949, which is discussed in Note 4. Transaction costs of the Initial Public Offering amounted to $12,949,739, consisting of $4,432,949 of underwriting discount, $7,757,660 of deferred underwriting discount and $759,130 of other offering costs. Of the transaction costs upon the closing of the Initial Public Offering and the underwriters’ partial exercise of the over-allotment option, the Company recorded $12,246,237 of offering costs as a reduction of equity in connection with the Class A common stock included in the Units, and immediately expensed $703,509 of offering costs in connection with the warrants that were classified as liabilities. Following the closing of the Initial Public Offering on July 2, 2021, and the partial exercise of the over-allotment option on July 14, 2021, a total of $221,647,440 ($10.00 per Unit) from the net proceeds of the sale of the Units in the Initial Public Offering and pursuant to the partial exercise of the over-allotment option, together with certain of the proceeds from the sale of the Private Placement Warrants in the Private Placements, was placed in a trust account (the “Trust Account”) located in the United States with Continental Stock Transfer & Trust Company, acting as trustee, and invested only in U.S. government securities with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act of 1940, as amended (the “Investment Company Act”), which invest only in direct U.S. government treasury obligations. Except with respect to interest earned on the funds held in the Trust Account that may be released to the Company to pay its franchise and income tax obligations (less up to $100,000 of interest to pay dissolution expenses), the proceeds from the Initial Public Offering and the sale of the Private Placement Warrants will not be released from the Trust Account until the earliest of (a) the completion of a Business Combination, (b) the redemption of any Public Shares properly submitted in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation (i) to modify the substance or timing of the Company’s obligation to redeem 100% of the Public Shares if the Company does not complete a Business Combination within 18 months from the closing of the Initial Public Offering (ii) with respect to any other provision relating to stockholders’ rights or pre-Business Combination activity, and (c) the redemption of the Public Shares if the Company is unable to complete a Business Combination within 18 months of the closing of the Initial Public Offering. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the holders of Public Shares (“public stockholders”). The Company will provide its public stockholders with the opportunity to redeem all or a portion of their Public Shares upon the completion of a Business Combination either: (i) in connection with a stockholder meeting called to approve the Business Combination; or (ii) by means of a tender offer. The decision as to whether the Company will seek stockholder approval of a proposed Business Combination or conduct a tender offer will be made by the Company, solely in its discretion, and will be based on a variety of factors such as the timing of the transaction and whether the terms of the transaction would require the Company to seek stockholder approval under applicable law or stock exchange listing requirement. The public stockholders will be entitled to redeem all or a portion of their Public Shares upon the completion of a Business Combination at a per share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of a Business Combination, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay its franchise and income taxes, divided by the number of then outstanding Public Shares, subject to the limitations described herein. The Company will have only 18 months from the closing of the Initial Public Offering (the “Combination Period”) to complete a Business Combination. If the Company is unable to complete a Business Combination within the Combination Period, the Company will: (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not 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 the Company to pay its franchise and income 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), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining stockholders and the board of directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. The Sponsor, officers, directors and certain stockholders of the Company have entered into a letter agreement with the Company, pursuant to which they have agreed to: (i) waive their redemption rights with respect to any founder shares (as defined below) and Public Shares held by them, as applicable, in connection with the completion of a Business Combination, (ii) waive their redemption rights with respect to any founder shares and Public Shares held by them, as applicable, in connection with a stockholder vote to approve an amendment to the Company’s amended and restated certificate of incorporation (A) to modify the substance or timing of the Company’s obligation to redeem 100% of the Public Shares if the Company does not complete a Business Combination within the Combination Period or (B) with respect to any other provision relating to stockholders’ rights or pre-initial Business Combination activity and (iii) waive their rights to liquidating distributions from the Trust Account with respect to any founder shares they hold if the Company fails to complete a Business Combination within the Combination Period, although they will be entitled to liquidating distributions from the Trust Account with respect to any Public Shares they hold if we fail to complete a Business Combination within the Combination Period. If the Company submits a Business Combination to the public stockholders for a vote, the Sponsor, officers, directors and certain stockholders have agreed to vote any founder shares and any Public Shares held by them in favor of a Business Combination. The Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or similar agreement or Business Combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per public share and (ii) the actual amount per public share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the trust assets, less taxes payable, provided that such liability will not apply to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) nor will it apply to any claims under the Company’s indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act. However, the Company has not asked the Sponsor to reserve for such indemnification obligations, nor have we independently verified whether the Sponsor has sufficient funds to satisfy its indemnity obligations and believe that the Sponsor’s only assets are securities of the Company. Therefore, the Company cannot assure you that the Sponsor would be able to satisfy those obligations. *Risks and Uncertainties* Management continues to evaluate the impact of the COVID-19 pandemic on the industry and has concluded that while it is reasonably possible that the virus could have a negative effect on the Company’s financial position, results of its operations and/or search for a target company, the specific impact is not readily determinable as of the date of the financial statement. The financial statement does not include any adjustments that might result from the outcome of this uncertainty. Going Concern In connection with the Company’s assessment of going concern considerations in accordance with Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 205-40, “Presentation of Financial Statements – Going Concern (Subtopic 205-40),” the Company has until January 2, 2023, to consummate a Business Combination. It is uncertain that the Company will be able to consummate a Business Combination by this time. If a Business Combination is not consummated by this date, there will be a mandatory liquidation and subsequent dissolution of the Company. Management has determined that the mandatory liquidation, should a Business Combination not occur, and potential subsequent dissolution raises substantial doubt about the Company’s ability to continue as a going concern. No adjustments have been made to the carrying amounts of assets or liabilities should the Company be required to liquidate after January 2, 2023.

Description of Organization and Business Operations

12 Months Ended

Dec. 31, 2021

DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS

NOTE 1. DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS

Shelter Acquisition Corporation I (the “Company”) is a blank check company incorporated as a Delaware corporation on December 11, 2020. The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses (“Business Combination”). The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act of 1933, as amended (the “Securities Act”), as modified by the Jumpstart our Business Startups Act of 2012 (the “JOBS Act”) and, as such, the Company is subject to all of the risks associated with early stage and emerging growth companies. The Company’s sponsor is Shelter Sponsor LLC, a Delaware limited liability company (the “Sponsor”).

The Company is not limited to a particular industry or sector for purposes of consummating a Business Combination, however, the Company intends to concentrate on identifying businesses that provide technologically innovative solutions to the real estate industry, broadly defined as “PropTech.”

As of December 31, 2021, the Company had not commenced any operations. All activity for the period from December 11, 2020 (inception) through December 31, 2021, relates to the Company’s formation and its initial public offering (the “Initial Public Offering”) as described below. The Company will not generate any operating revenues until after the completion of a Business Combination, at the earliest. The Company generates non-operating income in the form of interest income on cash and cash equivalents from the proceeds derived from the Initial Public Offering.

The registration statement for the Company’s Initial Public Offering was declared effective on June 29, 2021. On July 2, 2021, the Company consummated its Initial Public Offering of 20,000,000 units (the “Units”). Each Unit consists of one share of Class A common stock, par value $0.0001 per share (“Class A common stock” and shares thereof sold in the Initial Public Offering, “Public Shares”), and one-half of one redeemable warrant of the Company (“Public Warrant”), each whole Public Warrant exercisable into one share of Class A common stock at an exercise price of $11.50 per share. The Units were sold at a price of $10.00 per unit, generating gross proceeds to the Company of $200,000,000, which is discussed in Note 3.

Simultaneously with the consummation of the Initial Public Offering and the sale of the Units, the Company consummated the sale of 6,250,000 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, in a private placement (the “Private Placement”) generating gross proceeds of $6,250,000, which is discussed in Note 4.

On July 14, 2021, the Company issued an additional 2,164,744 Units in connection with the partial exercise by the underwriters of their over-allotment option, generating gross proceeds of $21,647,440, which is discussed in Note 3. Simultaneously with the closing of the underwriters’ partial exercise of the over-allotment option, the Company sold an additional 432,949 Private Placement Warrants, at a price of $1.00 per Private Placement Warrant, to the Sponsor in a private placement (together with the Private Placement, the “Private Placements”) generating gross proceeds of $432,949, which is discussed in Note 4.

Transaction costs of the Initial Public Offering amounted to $12,949,739, consisting of $4,432,949 of underwriting discount, $7,757,660 of deferred underwriting discount and $759,130 of other offering costs. Of the transaction costs upon the closing of the Initial Public Offering and the underwriters’ partial exercise of the over-allotment option, the Company recorded $12,246,237 of offering costs as a reduction of equity in connection with the Class A common stock included in the Units, and immediately expensed $703,509 of offering costs in connection with the warrants that were classified as liabilities.

Following the closing of the Initial Public Offering on July 2, 2021, and the partial exercise of the over-allotment option on July 14, 2021, a total of $221,647,440 ($10.00 per Unit) from the net proceeds of the sale of the Units in the Initial Public Offering and pursuant to the partial exercise of the over-allotment option, together with certain of the proceeds from the sale of the Private Placement Warrants in the Private Placements, was placed in a trust account (the “Trust Account”) located in the United States with Continental Stock Transfer & Trust Company, acting as trustee, and invested only in U.S. government securities with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act of 1940, as amended (the “Investment Company Act”), which invest only in direct U.S. government treasury obligations. Except with respect to interest earned on the funds held in the Trust Account that may be released to the Company to pay its franchise and income tax obligations (less up to $100,000 of interest to pay dissolution expenses), the proceeds from the Initial Public Offering and the sale of the Private Placement Warrants will not be released from the Trust Account until the earliest of (a) the completion of a Business Combination, (b) the redemption of any Public Shares properly submitted in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation (i) to modify the substance or timing of the Company’s obligation to redeem 100% of the Public Shares if the Company does not complete a Business Combination within 18 months from the closing of the Initial Public Offering (ii) with respect to any other provision relating to stockholders’ rights or pre-Business Combination activity, and (c) the redemption of the Public Shares if the Company is unable to complete a Business Combination within 18 months of the closing of the Initial Public Offering. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the holders of Public Shares (“public stockholders”).

The Company will provide its public stockholders with the opportunity to redeem all or a portion of their Public Shares upon the completion of a Business Combination either: (i) in connection with a stockholder meeting called to approve the Business Combination; or (ii) by means of a tender offer. The decision as to whether the Company will seek stockholder approval of a proposed Business Combination or conduct a tender offer will be made by the Company, solely in its discretion, and will be based on a variety of factors such as the timing of the transaction and whether the terms of the transaction would require the Company to seek stockholder approval under applicable law or stock exchange listing requirement. The public stockholders will be entitled to redeem all or a portion of their Public Shares upon the completion of a Business Combination at a per share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of a Business Combination, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay its franchise and income taxes, divided by the number of then outstanding Public Shares, subject to the limitations described herein.

The Company will have only 18 months from the closing of the Initial Public Offering (the “Combination Period”) to complete a Business Combination. If the Company is unable to complete a Business Combination within the Combination Period, the Company will: (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not 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 the Company to pay its franchise and income 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), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining stockholders and the board of directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law.

The Sponsor, officers, directors and certain stockholders of the Company have entered into a letter agreement with the Company, pursuant to which they have agreed to: (i) waive their redemption rights with respect to any founder shares (as defined below) and Public Shares held by them, as applicable, in connection with the completion of a Business Combination, (ii) waive their redemption rights with respect to any founder shares and Public Shares held by them, as applicable, in connection with a stockholder vote to approve an amendment to the Company’s amended and restated certificate of incorporation (A) to modify the substance or timing of the Company’s obligation to redeem 100% of the Public Shares if the Company does not complete a Business Combination within the Combination Period or (B) with respect to any other provision relating to stockholders’ rights or pre-initial Business Combination activity and (iii) waive their rights to liquidating distributions from the Trust Account with respect to any founder shares they hold if the Company fails to complete a Business Combination within the Combination Period, although they will be entitled to liquidating distributions from the Trust Account with respect to any Public Shares they hold if we fail to complete a Business Combination within the Combination Period. If the Company submits a Business Combination to the public stockholders for a vote, the Sponsor, officers, directors and certain stockholders have agreed to vote any founder shares and any Public Shares held by them in favor of a Business Combination.

The Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or similar agreement or Business Combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per public share and (ii) the actual amount per public share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the trust assets, less taxes payable, provided that such liability will not apply to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) nor will it apply to any claims under the Company’s indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act. However, the Company has not asked the Sponsor to reserve for such indemnification obligations, nor have we independently verified whether the Sponsor has sufficient funds to satisfy its indemnity obligations and believe that the Sponsor’s only assets are securities of the Company. Therefore, the Company cannot assure you that the Sponsor would be able to satisfy those obligations.

Risks and Uncertainties

Management continues to evaluate the impact of the COVID-19 pandemic on the industry and has concluded that while it is reasonably possible that the virus could have a negative effect on the Company’s financial position, results of its operations and/or search for a target company, the specific impact is not readily determinable as of the date of the financial statement. The financial statement does not include any adjustments that might result from the outcome of this uncertainty.

Going Concern

In connection with the Company’s assessment of going concern considerations in accordance with Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 205-40, “Presentation of Financial Statements – Going Concern (Subtopic 205-40),” the Company has until January 2, 2023, to consummate a Business Combination. It is uncertain that the Company will be able to consummate a Business Combination by this time. If a Business Combination is not consummated by this date, there will be a mandatory liquidation and subsequent dissolution of the Company. Management has determined that the mandatory liquidation, should a Business Combination not occur, and potential subsequent dissolution raises substantial doubt about the Company’s ability to continue as a going concern. No adjustments have been made to the carrying amounts of assets or liabilities should the Company be required to liquidate after January 2, 2023.