Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of presentation 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 pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) for interim financial reporting. Accordingly, these unaudited condensed financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. These unaudited condensed financial statements include all adjustments necessary to fairly state the financial position and the results of our operations and cash flows for interim periods in accordance with GAAP. All such adjustments are of a normal, recurring nature. The results for any interim period are not necessarily indicative of the results that may be expected for the year ending December 31, 2022 or for any future period. The condensed balance sheets presented as of December 31, 2021 has been derived from the audited financial statements as of that date. The condensed financial statements and notes as presented do not contain all information that is included in the annual financial statements and notes thereto of the Company. The condensed financial statements and notes included in this Quarterly Report should be read in conjunction with the financial statements and notes included in the Company’s 2021 Annual Report on Form 10-K (Annual Report) filed with the SEC. The significant accounting policies used in preparation of these condensed financial statements for the six months ended June 30, 2022 are consistent with those described in our Annual Report.
Use of Estimates	Use of estimates The preparation of financial statements in conformity with GAAP requires management to make judgments, estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. The Company bases its estimates and judgments on historical experience and on various other assumptions, including knowledge about current events and expectations about actions the Company may take in the future, that the Company believes are reasonable under the circumstances. Significant estimates include, but are not limited to, recoverability of long-lived assets, accrued research and development costs, inventory valuation reserves, estimation of variable consideration, stock-based compensation expense, the measurement of right-of-use assets and lease liabilities, allowance for doubtful accounts, and uncertain tax positions. Actual results could vary from the amounts derived from management’s estimates and assumptions.
Reclassifications	Reclassifications The accompanying condensed statements of cash flows for the six month period ended June 30, 2021 and the accompanying condensed balance sheets for the year ended December 31, 2021 reflects the Company's reclassification of grants receivables and unbilled grants receivables to accounts receivable, to conform to the presentation of the current period.
Allowance receivable, net	Accounts receivable, net Accounts receivable include trade receivables, unbilled receivables and grant receivables. The allowance for doubtful accounts reflects the current estimate of credit losses expected to be incurred over the life of the accounts receivable. The Company considers various factors in establishing, monitoring, and adjusting its allowance for doubtful accounts, including the aging of the accounts and aging trends and specific exposures related to particular customers. Accounts receivable are charged off after all reasonable means to collect the full amount have been exhausted. The Company has an immaterial allowance for doubtful accounts as of June 30, 2022.
Concentration of Credit Risk and Other Risks and Uncertainties	Concentration of credit risk and other risks and uncertainties Financial instruments which potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, and accounts receivables. The Company’s cash is deposited in accounts at large financial institutions and its cash equivalents are primarily held in prime and U.S. government money market funds. The Company believes it is not exposed to significant credit risk due to the financial strength of the depository institutions in which the cash and cash equivalents are held. The Company is subject to risks common to companies in the diagnostics industry including, but not limited to, uncertainties related to commercialization of products, regulatory approvals, and protection of intellectual property rights. The COVID-19 pandemic continues to drive volatility in global economic conditions as governments around the world implement various measures to slow and control the ongoing spread of the virus. Resurgences in COVID-19 infections or new strains of the virus may affect our operations. We continue to evaluate the potential impact of the COVID-19 pandemic on our current and future business and operations, including our expenses and clinical trials, as well as on our industry and the healthcare system. The Company is dependent on key suppliers for certain manufacturing and research and development activities. An interruption in the supply of these materials could temporarily impact the Company’s ability to commercialize, manufacture inventory and perform research and development, testing and clinical trials related to its products. The Company is also dependent on its manufacturing partners and third party logistic partner that are critical to its ability to supply product to its end customers.
Inventory	Inventory Inventory, which consists of finished goods, is valued at the lower of cost or net realizable value. The Company determines the cost of inventory using the first-in, first-out method. Lower of cost or net realizable value is evaluated by considering obsolescence, excessive levels of inventory, deterioration and other factors. In order to assess the ultimate realization of inventories, the Company is required to make judgments as to future demand requirements compared to current or committed inventory levels. The Company periodically reviews its inventories for shelf life, excess or obsolescence and writes-down obsolete or otherwise unmarketable inventory to its estimated net realizable value. If the actual net realizable value is less than the carrying value, or if it is determined that inventory utilization will further diminish based on estimates of demand, additional inventory write-downs may be required. Amounts written-down due to inventory are recorded in cost of product sold and a new lower-cost basis for the inventory is established. Excess and obsolete inventory is primarily based on estimated forecasted sales, usage levels, and expiration dates.
Revenue Recognition	Revenue Recognition Product revenue, net The Company generates revenues from its sales of third-party Antigen Tests. The Company obtains control of the product and assumes inventory risk before it is transferred to the customer and therefore reports revenue on the gross amount billed to the customer. The Company has recognized sales from two primary customer types: (i) direct customers including hospitals, urgent care centers, physician, public health and retail clinics, and (ii) sub-distributors. The Company recognizes revenue under Accounting Standards Codification Topic 606 (ASC 606), Revenue from Contracts with Customers, when a customer obtains control of promised goods or services, with a transaction price that reflects the consideration which the entity expects to receive in exchange for those goods or services. Transaction price does not include amounts subject to uncertainties unless it is probable that there will be no significant reversal of revenue when the uncertainty is resolved. If necessary, revenue is recorded net of variable consideration based on the amounts the Company expects to be earned or to be claimed on the related sales. The Company estimates the amount of its product sales that may result in returns or in price adjustments and records this estimate as a reduction of revenue in the period the related product revenue is recognized. The returned assets cannot be re-sold and have no value to the Company. The Company identifies the contract with a customer and determines the performance obligations and the contract price. The contract price is allocated to the distinct performance obligations in the contract and revenue is recognized when the performance obligations have been satisfied. A performance obligation is considered to be satisfied once the control of a product is transferred to the customer or the service is provided to the customer, meaning the customer has the ability to use and obtain the benefit of the goods or service, generally at product shipment. The Company recognizes receivables in an amount expected to be collected in a transaction. The Company’s payment terms are generally net 30 days of billing. Contracts do not contain significant financing components based on the typical period of time between delivery of products and collection of contract consideration. Certain types of customers may pay in advance of product delivery. In those instances, payment and delivery typically occur in the same month. The Company invoices its customers upon shipment of product and records its sales upon shipment in accordance with its standard terms and conditions, unless underlying customer contracts specify otherwise. When necessary, the Company invoices and collects sales tax from its customers for sales of products. The Company has elected to exclude sales tax from the measurement of the transaction price. Contract balances A receivable is recognized in the period the Company delivers goods or provides services or when the Company’s right to consideration is unconditional. The Company usually does not record contract assets because the Company has an unconditional right to payment upon satisfaction of the performance obligation, and therefore, a receivable is more commonly recorded than a contract asset. Receivables from contracts with customers are included within accounts receivable, net on the condensed balance sheets. Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. When performance obligations are not transferred to a customer at the end of a reporting period, cash received associated with the amount allocated to those performance obligations is reflected as contract liabilities on the condensed balance sheets and is deferred until control of these performance obligations is transferred to the customer. There are no contract liabilities as of June 30, 2022. Contract costs Under ASC 606, the Company is required to capitalize incremental costs to obtain customer contracts if the costs relate directly to a contract that can be specifically identified and expect to be recovered. These costs are required to be amortized to expense consistent with the transfer of the goods or services to the customer to which the asset relates. As a practical expedient, the Company recognizes any incremental costs to obtain a contract as an expense when incurred if the amortization period of the asset is one year or less. The Company did not have any capitalized contract costs for the six months ended June 30, 2022.
Costs of product sold	Costs of product sold Costs of product sold include material costs, direct labor, provisions for inventory write-downs and shipping and handling costs incurred. The Company reports product shipment costs within cost of products sold in the accompanying statements of operations.
New Accounting Pronouncements	New accounting pronouncements Recently adopted accounting standards In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses to require the measurement of expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable forecasts. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The Company early adopted ASU 2016-13 on January 1, 2022 with no impact on its accumulated deficit, current financial position, results of operations and comprehensive loss or cash flows.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2022

Basis of presentation

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 pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) for interim financial reporting. Accordingly, these unaudited condensed financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. These unaudited condensed financial statements include all adjustments necessary to fairly state the financial position and the results of our operations and cash flows for interim periods in accordance with GAAP. All such adjustments are of a normal, recurring nature. The results for any interim period are not necessarily indicative of the results that may be expected for the year ending December 31, 2022 or for any future period.

The condensed balance sheets presented as of December 31, 2021 has been derived from the audited financial statements as of that date. The condensed financial statements and notes as presented do not contain all information that is included in the annual financial statements and notes thereto of the Company. The condensed financial statements and notes included in this Quarterly Report should be read in conjunction with the financial statements and notes included in the Company’s 2021 Annual Report on Form 10-K (Annual Report) filed with the SEC.

The significant accounting policies used in preparation of these condensed financial statements for the six months ended June 30, 2022 are consistent with those described in our Annual Report.

Use of Estimates

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make judgments, estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. The Company bases its estimates and judgments on historical experience and on various other assumptions, including knowledge about current events and expectations about actions the Company may take in the future, that the Company believes are reasonable under the circumstances. Significant estimates include, but are not limited to, recoverability of long-lived assets, accrued research and development costs, inventory valuation reserves, estimation of variable consideration, stock-based compensation expense, the measurement of right-of-use assets and lease liabilities, allowance for doubtful accounts, and uncertain tax positions. Actual results could vary from the amounts derived from management’s estimates and assumptions.

Reclassifications

The accompanying condensed statements of cash flows for the six month period ended June 30, 2021 and the accompanying condensed balance sheets for the year ended December 31, 2021 reflects the Company's reclassification of grants receivables and unbilled grants receivables to accounts receivable, to conform to the presentation of the current period.

Allowance receivable, net

Accounts receivable, net

Accounts receivable include trade receivables, unbilled receivables and grant receivables. The allowance for doubtful accounts reflects the current estimate of credit losses expected to be incurred over the life of the accounts receivable. The Company considers various factors in establishing, monitoring, and adjusting its allowance for doubtful accounts, including the aging of the accounts and aging trends and specific exposures related to particular customers. Accounts receivable are charged off after all reasonable means to collect the full amount have been exhausted. The Company has an immaterial allowance for doubtful accounts as of June 30, 2022.

Concentration of Credit Risk and Other Risks and Uncertainties

Concentration of credit risk and other risks and uncertainties

Financial instruments which potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, and accounts receivables. The Company’s cash is deposited in accounts at large financial institutions and its cash equivalents are primarily held in prime and U.S. government money market funds. The Company believes it is not exposed to significant credit risk due to the financial strength of the depository institutions in which the cash and cash equivalents are held.

The Company is subject to risks common to companies in the diagnostics industry including, but not limited to, uncertainties related to commercialization of products, regulatory approvals, and protection of intellectual property rights.

The COVID-19 pandemic continues to drive volatility in global economic conditions as governments around the world implement various measures to slow and control the ongoing spread of the virus. Resurgences in COVID-19 infections or new strains of the virus may affect our operations. We continue to evaluate the potential impact of the COVID-19 pandemic on our current and future business and operations, including our expenses and clinical trials, as well as on our industry and the healthcare system.

The Company is dependent on key suppliers for certain manufacturing and research and development activities. An interruption in the supply of these materials could temporarily impact the Company’s ability to commercialize, manufacture inventory and perform research and development, testing and clinical trials related to its products. The Company is also dependent on its manufacturing partners and third party logistic partner that are critical to its ability to supply product to its end customers.

Inventory

Inventory, which consists of finished goods, is valued at the lower of cost or net realizable value. The Company determines the cost of inventory using the first-in, first-out method. Lower of cost or net realizable value is evaluated by considering obsolescence, excessive levels of inventory, deterioration and other factors.

In order to assess the ultimate realization of inventories, the Company is required to make judgments as to future demand requirements compared to current or committed inventory levels. The Company periodically reviews its inventories for shelf life, excess or obsolescence and writes-down obsolete or otherwise unmarketable inventory to its estimated net realizable value. If the actual net realizable value is less than the carrying value, or if it is determined that inventory utilization will further diminish based on

estimates of demand, additional inventory write-downs may be required. Amounts written-down due to inventory are recorded in cost of product sold and a new lower-cost basis for the inventory is established. Excess and obsolete inventory is primarily based on estimated forecasted sales, usage levels, and expiration dates.

Revenue Recognition

Product revenue, net

The Company generates revenues from its sales of third-party Antigen Tests. The Company obtains control of the product and assumes inventory risk before it is transferred to the customer and therefore reports revenue on the gross amount billed to the customer. The Company has recognized sales from two primary customer types: (i) direct customers including hospitals, urgent care centers, physician, public health and retail clinics, and (ii) sub-distributors.

The Company recognizes revenue under Accounting Standards Codification Topic 606 (ASC 606), Revenue from Contracts with Customers, when a customer obtains control of promised goods or services, with a transaction price that reflects the consideration which the entity expects to receive in exchange for those goods or services. Transaction price does not include amounts subject to uncertainties unless it is probable that there will be no significant reversal of revenue when the uncertainty is resolved. If necessary, revenue is recorded net of variable consideration based on the amounts the Company expects to be earned or to be claimed on the related sales. The Company estimates the amount of its product sales that may result in returns or in price adjustments and records this estimate as a reduction of revenue in the period the related product revenue is recognized. The returned assets cannot be re-sold and have no value to the Company.

The Company identifies the contract with a customer and determines the performance obligations and the contract price. The contract price is allocated to the distinct performance obligations in the contract and revenue is recognized when the performance obligations have been satisfied. A performance obligation is considered to be satisfied once the control of a product is transferred to the customer or the service is provided to the customer, meaning the customer has the ability to use and obtain the benefit of the goods or service, generally at product shipment.

The Company recognizes receivables in an amount expected to be collected in a transaction. The Company’s payment terms are generally net 30 days of billing. Contracts do not contain significant financing components based on the typical period of time between delivery of products and collection of contract consideration. Certain types of customers may pay in advance of product delivery. In those instances, payment and delivery typically occur in the same month. The Company invoices its customers upon shipment of product and records its sales upon shipment in accordance with its standard terms and conditions, unless underlying customer contracts specify otherwise. When necessary, the Company invoices and collects sales tax from its customers for sales of products. The Company has elected to exclude sales tax from the measurement of the transaction price.

Contract balances

A receivable is recognized in the period the Company delivers goods or provides services or when the Company’s right to consideration is unconditional. The Company usually does not record contract assets because the Company has an unconditional right to payment upon satisfaction of the performance obligation, and therefore, a receivable is more commonly recorded than a contract asset. Receivables from contracts with customers are included within accounts receivable, net on the condensed balance sheets.

Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. When performance obligations are not transferred to a customer at the end of a reporting period, cash received associated with the amount allocated to those performance obligations is reflected as contract liabilities on the condensed balance sheets and is deferred until control of these performance obligations is transferred to the customer. There are no contract liabilities as of June 30, 2022.

Contract costs

Under ASC 606, the Company is required to capitalize incremental costs to obtain customer contracts if the costs relate directly to a contract that can be specifically identified and expect to be recovered. These costs are required to be amortized to expense consistent with the transfer of the goods or services to the customer to which the asset relates. As a practical expedient, the Company recognizes any incremental costs to obtain a contract as an expense when incurred if the amortization period of the asset is one year or less. The Company did not have any capitalized contract costs for the six months ended June 30, 2022.

Costs of product sold

Costs of product sold include material costs, direct labor, provisions for inventory write-downs and shipping and handling costs incurred. The Company reports product shipment costs within cost of products sold in the accompanying statements of operations.

New Accounting Pronouncements

New accounting pronouncements

Recently adopted accounting standards

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses to require the measurement of expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable forecasts. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The Company early adopted ASU 2016-13 on January 1, 2022 with no impact on its accumulated deficit, current financial position, results of operations and comprehensive loss or cash flows.