3.	Summary of Significant Accounting Policies

Basis of presentation and principals of consolidation – The accompanying unaudited condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to the Current Report on Form 10-Q and Article 8 Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for annual financial statements. The condensed financial statements and notes should be read in conjunction with the consolidated financial statements and notes for the year ended December 31, 2021 included in the Company's Annual Report on Form 10-K for the year ended December 31, 2021, as filed with the Securities and Exchange Commission on April 18, 2022. In the opinion of management, all adjustments, consisting of normal accruals, considered necessary for a fair presentation of the interim financial statements have been included. Results for the three months ended March 31, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022.

Recently adopted accounting pronouncements - New accounting pronouncements implemented by the Company are discussed below or in the related notes, where appropriate.

Accounting estimates – The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. Significant areas that require the Company to make estimates include revenue recognition, stock-based compensation, stock warrants liabilities and allowance for credit losses. Actual results could differ from those estimates.

Operating cycle – The length of the Company’s contracts varies, but is typically between six to twelve months. In some instances, the length of the contract may exceed twelve months. Assets and liabilities relating to contracts are included in current assets and current liabilities, respectively, in the accompanying balance sheets as they will be liquidated in the normal course of contract completion, which at times could exceed one year.

Reclassification – Certain prior year balances were reclassed to conform to current period presentation. There was no impact to income (loss) or cash flows as a result of these reclassifications.

Revenue recognition – The Company determines, at contract inception, whether it will transfer control of a promised good or service over time or at a point in time, regardless of the length of contract or other factors. The recognition of revenue aligns with the timing of when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. To achieve this core principle, the Company applies the following five steps in accordance with its revenue policy:

(1)  Identify the contract with a customer

(2)  Identify the performance obligations in the contract

(3)  Determine the transaction price

(4)  Allocate the transaction price to performance obligations in the contract

(5)  Recognize revenue as performance obligations are satisfied

On certain contracts, the Company applies recognition of revenue over time, which is similar to the method the Company applied under previous guidance (i.e. percentage of completion). Due to uncertainties inherent in the estimation process, it is possible that estimates of costs to complete a performance obligation will be revised in the near-term. For those performance obligations for which revenue is recognized using a cost-to-cost input method, changes in total estimated costs, and related progress toward complete satisfaction of the performance obligation, are recognized on a cumulative catch-up basis in the period in which the revisions to the estimates are made. When the current estimate of total costs for a performance obligation indicate a loss, a provision for the entire estimated loss on the unsatisfied performance obligation is made in the period in which the loss becomes evident.

For product or equipment sales, the Company applies recognition of revenue when the customer obtains control over such goods, which is at a point in time.

On October 3, 2019, the Company entered into an Exclusive License Agreement (“ELA” ) pursuant to which it granted an exclusive license for its technology as outlined in the ELA. The ELA is described below. Under the ELA, the Company was to receive royalty payments based upon gross revenues earned by the licensee for commercialized products within the field of design and project management platforms for residential use, including single-family residences and multi-family residences, but excluding military housing. The Company has determined that the ELA granted the licensee a right to access the Company’s intellectual property throughout the license period (or its remaining economic life, if shorter), and thus recognizes revenue over time as the licensee recognized revenue and the Company has the right to payment of royalties. On June 15, 2021, the Company terminated the ELA that was executed on October 3, 2019 which is discussed below.

CMC Right of First Refusal Agreement – On October 9, 2019, the Company entered into a Right of First Refusal Agreement (the “Agreement”) with CMC Development LLC (“CMC”), which had a term of two (2) years. Under the Agreement, the Company had a right of first refusal with respect to being engaged as a designer and builder of any real estate projects for which CMC has secured the rights to develop and in which CMC has a greater than fifty percent (50%) interest in the owner or developer entity and has the right to select the builder for such real estate project (the “ROFR Rights”). In exchange for such ROFR Rights, the Company agreed to issue to CMC 2,500 shares of restricted stock of the Company’s common stock, of which 1,250 shares vested on March 31, 2021 and the remaining 1,250 shares was to vest and be issued on September 30, 2021 unless the Agreement is earlier terminated. In the event that the Agreement was earlier terminated, CMC was entitled to receive the entire amount of such restricted stock that had vested as of such earlier termination date, but in no event less than 1,250 shares of such restricted stock. The Agreement also provided for customary indemnification and confidentiality obligations between the parties. The 2,500 shares of restricted stock of the Company's common stock has yet to be issued to CMC.

The Agreement also provided that CMC has engaged the Company to build and design, in the aggregate, approximately 100 residential and commercial units at 1100 Ridge Avenue, Atlanta, Georgia, which is known as the “Ridge Avenue, Atlanta Project.” The total expected gross revenue to the Company for the project to be derived by CMC is approximately $16,900,000. The project is a residential project but it was not subject to the recently terminated ELA. The planning stage of the project was initially delayed due to COVID-19. The Company is no longer participating on Ridge Avenue as CMC has decided to proceed with this project as a traditional construction build. The Company previously reported this as a cancellation within the Company's backlog footnote, see Note 11 on this discussion. No revenue has been recognized under the Agreement during the three months ended March 31, 2022 and 2021.

The Company entered into a joint venture agreement with Clarity Lab Solutions, LLC (“Clarity Labs”) (the “JV”) in the fourth quarter of 2020. Revenue from the activities of the JV is related to clinical testing services and is recognized when services have been rendered, which is at a point in time.  Included in the consideration the Company expected to be entitled to receive, the Company estimates its contractual allowances, payer denials and price concessions. In addition, the Company formed Chicago Airport Testing, LLC which collected rental revenue from subleasing to a consortium of government entities assisting in COVID-19 testing. For the three months ended March 31, 2022 and 2021, the Company recognized approximately $6,885,828 and $5,863,358 related to activities through these two joint ventures, which is included in medical revenue on the accompanying consolidated statements of operations.

Disaggregation of Revenues

The Company’s revenues are principally derived from construction and engineering contracts related to Modules, and medical revenue derived from lab testing and test kit sales. The Company's contracts are with customers in various industries. Revenue recognized at a point in time and recognized over time were $6,885,828 and $1,718,770, respectively, for the three months ending March 31, 2022. Revenue recognized at a point in time and recognized over time were $5,965,413 and $3,222,214, respectively, for the three months ending March 31, 2021.



The following tables provide further disaggregation of the Company’s revenues by categories:

Three Months Ended March 31,

Revenue by Customer Type

2022

2021

Construction and Engineering Services:

   Government

$ 39

— %
$ 1,085,480

12 %

Hotel

897,244

10 %

170,426

2 %

Medical - Construction

—

—

%

251,560

3
%

  Multi-Family (includes Single Family)
77,626

1

%

44,746

—

%

Office
728,875

8

%

177,392

1

%

Retail

5,344

1 %

42,015

1 %

Special Use

9,642

— %

1,460,045

16 %

Subtotal

1,718,770

20 %

3,231,664

35 %

Medical Revenue:

Medical (lab testing, kit sales and equipment)

6,885,828

80
%
5,955,963

65

%

Total revenue by customer type

$

8,604,598

100

%

$

9,187,627

100

%

Contract Assets and Contract Liabilities

Accounts receivable are recognized in the period when the Company’s right to consideration is unconditional. Accounts receivable are recognized net of an allowance for credit losses. A considerable amount of judgment is required in assessing the likelihood of realization of receivables.

The timing of revenue recognition may differ from the timing of invoicing to customers.

Contract assets include unbilled amounts from long-term construction services when revenue recognized under the cost-to-cost measure of progress exceeds the amounts invoiced to customers, as the amounts cannot be billed under the terms of our contracts. Such amounts are recoverable from customers based upon various measures of performance, including achievement of certain milestones, completion of specified units or completion of a contract. Contract assets are generally classified as current within the condensed consolidated balance sheets.

Contract liabilities from construction and engineering contracts occur when amounts invoiced to customers exceed revenues recognized under the cost-to-cost measure of progress. Contract liabilities additionally include advanced payments from customers on certain contracts. Contract liabilities decrease as the Company recognizes revenue from the satisfaction of the related performance obligation. Contract liabilities are generally classified as current within the condensed consolidated balance sheet.

Although the Company believes it has established adequate procedures for estimating costs to complete on open contracts, it is at least reasonably possible that additional significant costs could occur on contracts prior to completion. The Company periodically evaluates and revises its estimates and makes adjustments when they are considered necessary.

Deferred Contract Costs - Prior to entering into the ELA, the Company was subject to an agreement to construct and develop a certain property (“Original Agreement”), which now is subject to the ELA. Upon entering into the ELA, the Company is no longer obliged to its Original Agreement. Upon entering the ELA, the Company had an outstanding accounts receivable balance of $306,143, which was forfeited and recognized this amount as deferred contract costs. This amount was offset by $102,217, which was reimbursement from the licensee for project costs on this project. The Company incurred total deferred contract costs of $203,926. The Company considered this amount an incremental cost of obtaining that ELA, because the Company expects to recover those costs through future royalty payments. The Company plans to amortize the asset over sixty months, which is the initial term of the ELA because the asset relates to the services transferred to the customer during the contract term. As of March 31, 2022, accumulated amortization related to deferred contract costs amounted to $101,963. During the three months ended March 31, 2022 and 2021, amortization expense relating to the deferred contract costs amounted to $10,196 and $10,196, respectively, and is included in general and administrative expenses on the accompanying condensed consolidated statement of operations. As previously mentioned, the ELA was terminated on June 15, 2021 but the Company expects to recover the deferred contract costs from the Assignment of Limited Rights Under Membership Interest Redemption Agreement, dated June 15, 2021 as described below.

Exclusive License Agreement – On October 3, 2019, as amended on October 17, 2019, the Company entered into the ELA with CPF GP 2019-1 LLC (the “Licensee”), pursuant to which the Company granted the Licensee an exclusive license (the “License”) solely within the United States and its legal territories to the Company’s technology, intellectual property, any improvements thereto, and any related permits, in order to develop and commercialize products within the field of design and project management platforms for residential use, including single-family residences and multi-family residences, but excluding military housing. The Ridge Avenue Project has also been excluded from the License. The License Agreement has an initial term of five (5) years and will automatically renew for subsequent five (5) year periods. The License Agreement provides for customary terminating provisions, including the right by the Company to terminate if the Licensee fails to make minimum royalty payments (as described below).

In consideration for the License, during the initial term, the Licensee agreed to pay the Company a royalty of (x) five percent (5%) on the first $20,000,000 of gross revenues derived from the Licensee’s commercialization of the License (net of customary discounts, sales taxes, delivery charges, and amounts for returns) (the “Gross Revenues”), (y) four and one-half percent (4.5%) on the next $30,000,000 of Gross Revenues, and (z) five percent (5%) on all Gross Revenues thereafter (collectively, the “Royalty”), subject to the following minimum royalty payments determined on a cumulative basis during the initial term: $500,000 in year 1, $750,000 in year 2, $1,500,000 in year 3, $2,000,000 in year 4, and $2,500,000 in year 5. In addition, to the extent the Licensee sublicensed any aspect of the License to a sub-licensee, the Licensee was obligated to pay to the Company fifty percent (50%) of all payments received by the Licensee from such sublicensee.

The ELA provided for customary indemnification obligations between the parties and further provides that the Licensee will indemnify the Company for any claims arising out of the commercialization of the License by the Licensee or any of its subsidiaries, contractors, or sublicensees.

On June 15, 2021, the Company terminated the ELA. In connection with the termination, the Company entered into a Settlement and Mutual Release Agreement (the “Settlement Agreement”) with CPF, the general partner (the “Licensee”) of CPF MF 2019-1 LLC (“CPF MF”), and Capital Plus Financial, LLC, a limited partner of the Licensee (“Capital Plus”) and an Assignment of Limited Rights Under Membership Interest Redemption Agreement, dated June 15, 2021, with Capital Plus and the Licensee. Pursuant to the Settlement Agreement with CPF and Capital Plus, the ELA was terminated, the Company released CPF and CPF MF for any claims in exchange for releases from CPF and Capital Plus and the Company received an assignment of CPF’s right under certain circumstances to a $1.25 million redemption distribution from CPF MF under its Operating Agreement.

Business Combinations - The Company accounts for business acquisitions using the acquisition method of accounting in accordance with ASC 805 “Business Combinations”, which requires recognition and measurement of all identifiable assets acquired and liabilities assumed at their fair value as of the date control is obtained. The Company determines the fair value of assets acquired and liabilities assumed based upon its best estimates of the acquisition-date fair value of assets acquired and liabilities assumed in the acquisition. Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired. Subsequent adjustments to fair value of any contingent consideration are recorded to the Company’s consolidated statements of operations. Costs that the Company incurs to complete the business combination are charged to general and administrative expenses as they are incurred.

Variable Interest Entities – The Company accounts for certain legal entities as variable interest entities (“VIE"). When evaluating a VIE for consolidation, the Company must determine whether or not there is a variable interest in the entity. Variable interests are investments or other interests that absorb portions of an entity’s expected losses or receive portions of the entity’s expected returns. If it is determined that the Company does not have a variable interest in the VIE, no further analysis is required and the VIE is not consolidated. If the Company holds a variable interest in a VIE, the Company consolidates the VIE when there is a controlling financial interest in the VIE and therefore are deemed to be the primary beneficiary. The Company is determined to have a controlling financial interest in a VIE when it has both the power to direct the activities of the VIE that most significantly impact the VIE economic performance and the obligation to absorb losses or the right to receive benefits of the VIE that could potentially be significant to that VIE. This determination is evaluated periodically as facts and circumstances change.

On August 27, 2020 the Company entered into a joint venture agreement with Clarity Lab Solutions, LLC (“Clarity Labs”) (the “JV”). In consideration and subject to Clarity Lab’s services and commitments and provided the agreement remains valid and in force, and is not terminated, the Company agreed to issue 200,000 restricted shares of SGB common stock over a defined vesting period starting in December 1, 2020. The restricted shares of SGB common stock were not issued to Clarity Labs as certain capital commitments were not met. Clarity Labs is a licensed clinical laboratory that uses specialized molecular testing equipment and that focuses on the diagnosis and treatment of critical diseases, including COVID-19. Clarity Labs is also engaged in the business of manufacturing, importing and distributing various medical tests. Under the JV, the Company and Clarity Labs will jointly market, sell, and distribute certain products and services (“Clarity Mobile Venture”). As of December 31, 2021, $502,958 was due to Clarity Labs for expenses paid on behalf of Clarity Mobile Venture, and is included in Due to Affiliates, Accounts Payable and Accrued Expenses on the accompanying consolidated balance sheets. In addition, during the year ended December 31, 2021, the Company recognized revenue of $60,110 and other income of $60,000 to Clarity Labs, of which none is included in accounts receivable as of December 31, 2021. The Company has determined it is the primary beneficiary of Clarity Mobile Venture and has thus consolidated the activities in its consolidated financial statements.

On January 18, 2021 the Company entered into an operating agreement to form CAT. The purpose of CAT was to market, sell, distribute, lease and otherwise commercially exploit certain products and services in the COVID-19 testing industry. The Company has determined it is the primary beneficiary of CAT and has thus consolidated the activities in its consolidated financial statements.

Investment Entities – On May 31, 2021, the Company's subsidiary SG DevCorp agreed to contribute $600,000 to acquire a 50% membership interest in Norman Berry II Owner LLC. The Company contributed $350,329 and $114,433 of the initial $600,000 in the second quarter and third quarter of 2021 respectively, with the remaining $135,238 funded in the fourth quarter of 2021. The purpose of Norman Berry II Owner LLC is to develop and provide affordable housing in the Atlanta, Georgia metropolitan area.  The Company has determined it is not the primary beneficiary of "Norman Berry" and thus will not consolidate the activities in its consolidated financial statements. The Company will use the equity method to report the activities as an investment in its consolidated financial statements.

On June 24, 2021, the Company's subsidiary, SG DevCorp, entered into an operating agreement with Jacoby Development for a 10% non-dilutable equity interest for JDI-Cumberland Inlet, LLC. The Company contributed $3,000,000 for its 10% equity interest. The purpose of JDI-Cumberland Inlet, LLC is to develop a waterfront parcel in a mixed-use destination community. The Company has determined it is not the primary beneficiary of JDI-Cumberland Inlet, LLC and thus will not consolidate the activities in its consolidated financial statements. The Company will use the equity method to report the activities as an investment in its consolidated financial statements.

On February 24, 2022 the Company made a $500,000 capital investment for a 1.2% ownership in Moliving, a nomadic hospitality solution company.
The Company also executed a side agreement to build the first sixty Moliving units and an additional ninety units after the first sixty units are manufactured.

Cash and cash equivalents – The Company considers cash and cash equivalents to include all short-term, highly liquid investments that are readily convertible to known amounts of cash and have original maturities of three months or less upon acquisition. Cash and cash equivalents totaled $13,146,418 and $13,024,381 as of March 31, 2022 and December 31, 2021, respectively.

Short-term investment – The Company classifies investments consisting of a certificate of deposit with a maturity greater than three months but less than one year as short-term investment. The Company had no short-term investment as of March 31, 2022 or 2021, respectively.

Accounts receivable and allowance for credit losses – Accounts receivable are receivables generated from sales to customers and progress billings on performance type contracts. Amounts included in accounts receivable are deemed to be collectible within the Company’s operating cycle. The Company recognizes accounts receivable at invoiced amounts.

The allowance for credit losses reflects the Company's best estimate of expected losses inherent in the accounts receivable balances. Management provides an allowance for credit losses based on the Company’s historical losses, specific customer circumstances, and general economic conditions. Periodically, management reviews accounts receivable and adjusts the allowance based on current circumstances and charges off uncollectible receivables when all attempts to collect have been exhausted and the prospects for recovery are remote. Recoveries are recognized when they are received. Actual collection losses may differ from our estimates and could be material to our consolidated financial position, results of operations, and cash flows.

Inventory – Raw construction materials (primarily shipping containers and fabrication materials) are valued at the lower of cost (first-in, first-out method) or net realizable value. Finished goods and work-in-process inventories are valued at the lower of cost or net realizable value, using the specific identification method. Medical equipment and COVID-19 test and testing supplies are valued at the lower of cost, (first-in, first-out method) or net realizable value. As of March 31, 2022 there was inventory of $336,586 for construction materials, and $717,756 of medical equipment and COVID-19 test and testing supplies. As of December 31, 2021 there was inventory of $516,731 for construction materials, and $757,094 of medical equipment and COVID-19 test and testing supplies.

Goodwill – The Company performs its impairment test of goodwill at the reporting unit level each fiscal year, or more frequently if events or circumstances change that would more likely than not reduce the fair value of its reporting unit below its carrying values. The Company performs a goodwill impairment test by comparing the fair value of the reporting unit with its carrying value and recognizes an impairment charge for the amount by which the carrying value exceeds the fair value, not to exceed the total amount of goodwill. The amount by which the carrying value of the goodwill exceeds its implied fair value, if any, is recognized as an impairment loss. There were no impairments during the  three months ended March 31, 2022 or 2021. The Company has taken the recent COVID-19 pandemic into consideration when determining impairment.

Intangible assets – Intangible assets consist of $2,766,000 of proprietary knowledge and technology, which is being amortized over 20 years. In addition, $97,164 of trademarks, and $47,800 of website costs are being amortized over 5 years.  The Company evaluated intangible assets for impairment during the year ended December 31, 2021, and determined that there were no impairment losses. There was no impairment during the three months ended March 31, 2022. The accumulated amortization as of March 31, 2022 and 2021 was $857,554 and $690,262, respectively. The amortization expense for the three months ended March 31, 2022 and 2021 was $41,823 and $40,407, respectively. The estimated amortization expense for the successive five years is as follows:



For the year ending December 31,:

2022

$

121,147

2023

161,176

2024

160,469

2025

157,052

2026

139,716

Thereafter

1,313,850

$

2,053,410

Property, plant and equipment – Property, plant and equipment is stated at cost. Depreciation is computed using the straight-line method over the estimated lives of each asset. Estimated useful lives for significant classes of assets are as follows: computer and software 3 to 5 years, furniture and other equipment 5 to 7 years, automobiles 2 to 5 years, buildings held for lease 5 to 7 years, and equipment 5 to 29 years. Repairs and maintenance are charged to expense when incurred.

Held For Sale Assets – On May 10, 2021 the Company's subsidiary, SG DevCo acquired the Lago Vista, Texas property for $3,576,130. Management has implemented a plan to sell this property, which meets all of the criteria required to classify it as Held for Sale. Including the project development costs associated with Lago Vista of $816,410, the book value is now $4,392,541.

Convertible instruments – The Company bifurcates conversion options from their host instruments and accounts for them as free standing derivative financial instruments according to certain criteria. The criteria include circumstances in which (a) the economic characteristics and risks of the embedded derivative instrument are not clearly and closely related to the economic characteristics and risks of the host contract, (b) the hybrid instrument that embodies both the embedded derivative instrument and the host contract is not re-measured at fair value under otherwise applicable generally accepted accounting principles with changes in fair value reported in earnings as they occur and (c) a separate instrument with the same terms as the embedded derivative instrument would be considered a derivative instrument.

Common stock purchase warrants and other derivative financial instruments – The Company classifies as equity any contracts that (i) require physical settlement or net-share settlement or (ii) provides a choice of net-cash settlement or settlement in the Company’s own shares (physical settlement or net-share settlement) providing that such contracts are indexed to the Company’s own stock. The Company classifies as assets or liabilities any contracts that (i) require net-cash settlement (including a requirement to net cash settle the contract if any event occurs and if that event is outside the Company’s control) or (ii) gives the counterparty a choice of net-cash settlement or settlement shares (physical settlement or net-cash settlement). The Company assesses classification of common stock purchase warrants and other free standing derivatives at each reporting date to determine whether a change in classification between assets and liabilities or equity is required.

Fair value measurements – Financial instruments, including cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities are carried at cost, which the Company believes approximates fair value due to the short-term nature of these instruments.

The Company measures the fair value of financial assets and liabilities based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value.

The Company uses three levels of inputs that may be used to measure fair value:

Level 1

Quoted prices in active markets for identical assets or liabilities.

Level 2

Quoted prices for similar assets and liabilities in active markets or inputs that are observable.

Level 3

Inputs that are unobservable (for example, cash flow modeling inputs based on assumptions).

Transfer into and transfers out of the hierarchy levels are recognized as if they had taken place at the end of the reporting period.

Share-based payments – The Company measures the cost of services received in exchange for an award of equity instruments based on the fair value of the award. For employees and directors, including non-employee directors, the fair value of a stock option award is measured on the grant date. The fair value amount is then recognized over the period services are required to be provided in exchange for the award, usually the vesting period. The Company recognizes stock-based compensation expense on a graded-vesting basis over the requisite service period for each separately vesting tranche of each award. Stock-based compensation expense to employees and all directors are reported within payroll and related expenses in the consolidated statements of operations. Stock-based compensation expense to non-employees is reported within marketing and business development expense in the condensed consolidated statements of operations.

Income taxes – The Company accounts for income taxes utilizing the asset and liability approach. Under this approach, deferred taxes represent the future tax consequences expected to occur when the reported amounts of assets and liabilities are recovered or paid. The provision for income taxes generally represents income taxes paid or payable for the current year plus the change in deferred taxes during the year. Deferred taxes result from the differences between the financial and tax bases of the Company’s assets and liabilities and are adjusted for changes in tax rates and tax laws when changes are enacted.

The calculation of tax liabilities involves dealing with uncertainties in the application of complex tax regulations. The Company recognizes liabilities for anticipated tax audit issues based on the Company’s estimate of whether, and the extent to which, additional taxes will be due. If payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the liabilities are no longer determined to be necessary. If the estimate of tax liabilities proves to be less than the ultimate assessment, a further charge to expense would result.

Concentrations of credit risk – Financial instruments, that potentially subject the Company to concentration of credit risk, consist principally of cash and cash equivalents. The Company places its cash with high credit quality institutions. At times, such amounts may be in excess of the FDIC insurance limits. The Company has not experienced any losses in such account and believes that it is not exposed to any significant credit risk on the account.

With respect to receivables, concentrations of credit risk are limited to a few customers in the construction industry. The Company performs ongoing credit evaluations of its customers’ financial condition and, generally, requires no collateral from its customers other than normal lien rights. At March 31, 2022 and December 31, 2021, 75% and 78%, respectively, of the Company’s gross accounts receivable were due from two and four customers.

Revenue relating to two and two customers represented approximately 90% and 80% of the Company's total revenue for the three months ended March 31, 2022 and 2021, respectively.

Cost of revenue relating to two and two vendors represented approximately 28% and 28% of the Company’s total cost of revenue for the three months ended March 31, 2022 and 2021, respectively. The Company believes it has access to alternative suppliers, with limited disruption to the business, should circumstances change with its existing suppliers.