The accompanying unaudited condensed financial statements have been prepared in accordance with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X for interim financial information and reflect all adjustments necessary to state fairly the Company’s financial position, results of operations and cash flows for the interim periods presented. All such adjustments are of a normal recurring nature. Results for interim periods are not indicative of the results for the entire fiscal year. The accompanying Condensed Financial Statements should be read in conjunction with the audited Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. Certain information and footnote disclosures, including significant accounting policies, normally included in fiscal year financial statements prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) have been condensed or omitted. The Condensed Balance Sheet as of December 31, 2020 was derived from the audited financial statements.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the balance sheet date and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.

Substantially all of the Company’s cash and cash equivalents are deposited with two major financial institutions in the United States. The Company continually monitors its positions with, and the credit quality of, the financial institution with which it holds cash. Periodically throughout the year, the Company has maintained balances in various operating accounts in excess of federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents. Restricted cash consists of deposits related to the Company’s corporate credit cards and prior to March 31, 2021, also included a letter of credit related to an operating lease agreement. As of March 31, 2021 and December 31, 2020, the Company had $0.1 million and $0.2 million in restricted cash, respectively, which was included in ‘Other current assets’ in the accompanying balance sheets.

Several of the components for certain of the Company's sample collection kits, test reagents, and test systems are obtained from single-source suppliers. If these single-source suppliers fail to satisfy the Company's requirements on a timely basis, it could suffer delays in being able to deliver its diagnostic solutions, a possible loss of revenue, or incur higher costs, any of which could adversely affect its operating results.

For a discussion of credit risk concentration of accounts receivable as of March 31, 2021 and 2020, see Note 9 – Revenue & Accounts Receivable Credit Concentration.

Inventory consists primarily of material supplies, which are consumed in the performance of testing services and charged to cost of sales. Inventory is stated at cost and reported within ‘Other current assets’ in the balance sheet and were $3.4 million and $3.2 million as of March 31, 2021 and December 31, 2020, respectively.

U.S. GAAP for fair value establishes a hierarchy that prioritizes fair value measurements based on the types of inputs used for the various valuation techniques (market approach, income approach, and cost approach). We utilize a combination of market and income approaches to value our financial instruments. Our financial assets and liabilities are measured using inputs from the three levels of the fair value hierarchy. Fair value measurements are categorized within the fair value hierarchy based upon the lowest level of the most significant inputs used to determine fair value. The three levels of the hierarchy and the related inputs are as follows:

Level		Inputs
1		Unadjusted quoted prices in active markets for identical assets and liabilities.
2		Unadjusted quoted prices in active markets for similar assets and liabilities;
		Unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active; or
		Inputs other than quoted prices that are observable for the asset or liability.
3		Unobservable inputs for the asset or liability.

The carrying amounts of certain financial instruments including cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities.

See Note 4 — Fair Value for further discussion related to estimated fair value measurements.