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Fair Value Measurements

9 Months Ended

Mar. 31, 2024

4. Fair Value Measurements

The carrying amounts of financial instruments such as cash equivalents, short-term investments and accounts payable approximate the related fair values due to the short-term maturities of these instruments. We invest our excess cash in financial instruments which are readily convertible into cash, such as money market funds and U.S. government securities. Cash equivalents and short-term investments are classified as Level 1 as defined by the fair value hierarchy. As of March 31, 2024 and June 30, 2023, we had no assets or liabilities measured on a recurring or non-recurring basis.

In May 2018, we issued warrants in connection with a private placement of our shares of common stock. Pursuant to the terms of the warrants, we could have been required to settle the warrants in cash in the event of an acquisition of us and, as a result, the warrants were required to be measured at fair value and reported as a liability in the condensed consolidated balance sheets. We recorded the fair value of the warrants upon issuance using the Black-Scholes valuation model and were required to revalue the warrants at each reporting date with any changes in fair value recorded in our condensed consolidated statement of operations through their expiration in May 2023. The valuation of the warrants were considered under Level 3 of the fair value hierarchy due to the need to use assumptions in the valuation that were both significant to the fair value measurement and unobservable. Inputs used to determine estimated fair value of the warrant liabilities included the estimated fair value of the underlying stock at the valuation date, the estimated term of the warrants, risk-free interest rates, expected dividends and the expected volatility of the underlying stock. The significant unobservable inputs used in the fair value measurement of the warrant liabilities were the volatility rate and the estimated term of the warrants. Generally, increases (decreases) in the fair value of the underlying stock and estimated term would result in a directionally similar impact to the fair value measurement. The change in the fair value of the Level 3 warrant liability is reflected in the condensed consolidated statements of operations for the three and nine months ended March 31, 2023. During the three and nine months ended March 31, 2024 and the year ended June 30, 2023, there were no transfers into or out of Level 3 of the fair value hierarchy.

To calculate the fair value of the warrant liability as of June 30, 2023, the following assumptions were used:


Risk-free interest rate		4.4	%
Expected life (years)		0.5
Expected volatility		128.7	%
Dividend yield		—	%
Weighted-average grant date fair value	$	0.02

The following table sets forth a summary of changes in the estimated fair value of our Level 3 warrant liability for the nine months ended March 31, 2023 (in thousands):


Balance as of June 30, 2022	$	1,603
Change in estimated fair value of liability classified warrants		(1,603	)
Balance as of March 31, 2023	$	—

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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